All ace editors must die. I found that certain editor modes will leave a mess in memory, so when editors are destroyed, I also set their modes to '' which seems to take care of most of the issue. They still leave memory behind just a little bit, though.

app/models/Level.coffee

@@ -139,7 +139,7 @@ module.exports = class Level extends CocoModel
       for component in thang.components or []
         continue unless lc = _.find levelComponents, {original: component.original}
         component.config ?= {}
-        TreemaNode.utils.populateDefaults(component.config, lc.configSchema)
+        TreemaUtils.populateDefaults(component.config, lc.configSchema)
         @lastType = 'component'
         @lastOriginal = component.original
         @walkDefaults component.config, lc.configSchema.properties
@@ -147,7 +147,7 @@ module.exports = class Level extends CocoModel
   fillInDefaultSystemConfiguration: (levelSystems) ->
     for system in levelSystems ? []
       system.config ?= {}
-      TreemaNode.utils.populateDefaults(system.config, system.model.configSchema)
+      TreemaUtils.populateDefaults(system.config, system.model.configSchema)
       @lastType = 'system'
       @lastOriginal = system.model.name
       @walkDefaults system.config, system.model.configSchema.properties
@@ -165,7 +165,7 @@ module.exports = class Level extends CocoModel
       else if schema.type is 'array' and config[prop]
         for item in config[prop] or []
           @walkDefaults item, schema.items
-          
+
   dimensions: ->
     width = 0
     height = 0

app/styles/editor/achievement/edit.sass

@@ -4,7 +4,7 @@
   .treema-root
     margin: 28px 0px 20px
 
-  button
+  .achievement-tool-button
     float: right
     margin-top: 15px
     margin-left: 10px

app/styles/editor/article/edit.sass

@@ -2,11 +2,11 @@
   .treema-root
     margin-bottom: 20px
 
-  button
+  .article-tool-button
     float: right
-    margin-top: 15px
+    margin-bottom: 15px
     margin-left: 10px
 
   textarea
     width: 92%
-    height: 300px
+    height: 300px

app/templates/editor/achievement/edit.jade

@@ -10,9 +10,9 @@ block content
       li.active
         | #{achievement.attributes.name}
 
-    button(data-i18n="", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#recalculate-button Recalculate
+    button.achievement-tool-button(data-i18n="", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#recalculate-button Recalculate
-    button(data-i18n="common.delete", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#delete-button Delete
+    button.achievement-tool-button(data-i18n="common.delete", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#delete-button Delete
-    button(data-i18n="common.save", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#save-button Save
+    button.achievement-tool-button(data-i18n="common.save", disabled=me.isAdmin() === true ? undefined : "true").btn.btn-primary#save-button Save
 
     h3(data-i18n="achievement.edit_achievement_title") Edit Achievement
       span

app/templates/editor/article/edit.jade

@@ -10,10 +10,10 @@ block content
       li.active
         | #{article.attributes.name}
 
-  button(data-i18n="general.version_history").btn.btn-primary#history-button Version History
+  button.article-tool-button(data-i18n="general.version_history").btn.btn-primary#history-button Version History
-  button(data-toggle="coco-modal", data-target="modal/RevertModal", data-i18n="editor.revert", disabled=authorized === true ? undefined : "true").btn.btn-primary#revert-button Revert
+  button.article-tool-button(data-toggle="coco-modal", data-target="modal/RevertModal", data-i18n="editor.revert", disabled=authorized === true ? undefined : "true").btn.btn-primary#revert-button Revert
-  button(data-i18n="article.edit_btn_preview", disabled=authorized === true ? undefined : "true").btn.btn-primary#preview-button Preview
+  button.article-tool-button(data-i18n="article.edit_btn_preview", disabled=authorized === true ? undefined : "true").btn.btn-primary#preview-button Preview
-  button(data-i18n="common.save", disabled=authorized === true ? undefined : "true").btn.btn-primary#save-button Save
+  button.article-tool-button(data-i18n="common.save", disabled=authorized === true ? undefined : "true").btn.btn-primary#save-button Save
 
   h3(data-i18n="article.edit_article_title") Edit Article
     span

app/views/editor/level/scripts/ScriptsTabView.coffee

@@ -18,6 +18,13 @@ module.exports = class ScriptsTabView extends CocoView
     super options
     @world = options.world
     @files = options.files
+    $(window).on 'resize', @onWindowResize
+
+  destroy: ->
+    @scriptTreema?.destroy()
+    @scriptTreemas?.destroy()
+    $(window).off 'resize', @onWindowResize
+    super()
 
   onLoaded: ->
   onLevelLoaded: (e) ->
@@ -116,10 +123,8 @@ module.exports = class ScriptsTabView extends CocoView
     # Update in-place so existing Treema nodes refer to the same array.
     @thangIDs?.splice(0, @thangIDs.length, @getThangIDs()...)
     
-  destroy: ->
+  onWindowResize: (e) =>
-    @scriptTreema?.destroy()
+    @$el.find('#scripts-treema').collapse('show') if $('body').width() > 800
-    @scriptTreemas?.destroy()
-    super()
 
 class ScriptsNode extends TreemaArrayNode
   nodeDescription: 'Script'
@@ -170,7 +175,7 @@ class EventPropsNode extends TreemaNode.nodeMap.string
     joined = '(unset)' if not joined.length
     @buildValueForDisplaySimply valEl, joined
 
-  buildValueForEditing: (valEl, data) -> 
+  buildValueForEditing: (valEl, data) ->
     super(valEl, data)
     channel = @getRoot().data.channel
     channelSchema = Backbone.Mediator.channelSchemas[channel]

app/views/editor/level/thangs/ThangsTabView.coffee

@@ -104,6 +104,8 @@ module.exports = class ThangsTabView extends CocoView
       $('#thangs-list').height(oldHeight - thangsHeaderHeight - 40)
     else
       $('#thangs-list').height(oldHeight - thangsHeaderHeight - 80)
+      $('#all-thangs').collapse 'show'
+      $('#add-thangs-column').collapse 'show'
 
   undo: (e) ->
     if not @editThangView then @thangsTreema.undo() else @editThangView.undo()
@@ -117,7 +119,7 @@ module.exports = class ThangsTabView extends CocoView
     $('.tab-content').mousedown @selectAddThang
     $('#thangs-list').bind 'mousewheel', @preventBodyScrollingInThangList
     @$el.find('#extant-thangs-filter button:first').button('toggle')
-    $(window).resize @onWindowResize
+    $(window).on 'resize', @onWindowResize
     @addThangsView = @insertSubView new AddThangsView world: @world
     @buildInterface() # refactor to not have this trigger when this view re-renders?
     if @thangsTreema.data.length
@@ -182,6 +184,7 @@ module.exports = class ThangsTabView extends CocoView
   destroy: ->
     @selectAddThangType null
     @surface.destroy()
+    $(window).off 'resize', @onWindowResize
     $(document).unbind 'contextmenu', @preventDefaultContextMenu
     @thangsTreema?.destroy()
     super()

app/views/editor/thang/ThangTypeEditView.coffee

@@ -59,6 +59,10 @@ module.exports = class ThangTypeEditView extends RootView
       @updateFileSize()
     @refreshAnimation = _.debounce @refreshAnimation, 500
 
+  showLoading: ($el) ->
+    $el ?= @$el.find('.outer-content')
+    super($el)
+
   getRenderData: (context={}) ->
     context = super(context)
     context.thangType = @thangType

app/views/play/level/PlayLevelView.coffee

@@ -84,7 +84,7 @@ module.exports = class PlayLevelView extends RootView
     @isEditorPreview = @getQueryVariable 'dev'
     @sessionID = @getQueryVariable 'session'
 
-    $(window).on('resize', @onWindowResize)
+    $(window).on 'resize', @onWindowResize
     @saveScreenshot = _.throttle @saveScreenshot, 30000
 
     if @isEditorPreview
@@ -536,6 +536,7 @@ module.exports = class PlayLevelView extends RootView
     @god?.destroy()
     @goalManager?.destroy()
     @scriptManager?.destroy()
+    $(window).off 'resize', @onWindowResize
     delete window.world # not sure where this is set, but this is one way to clean it up
     clearInterval(@pointerInterval)
     @bus?.destroy()

headless_client.coffee

@@ -42,6 +42,7 @@ Worker::removeEventListener = (what) ->
   if what is 'message'
     @onmessage = -> #This webworker api has only one event listener at a time.
 GLOBAL.tv4 = require('tv4').tv4
+GLOBAL.TreemaUtils = require './bower_components/treema/treema-utils.js'
 GLOBAL.marked = setOptions: ->
 store = {}
 GLOBAL.localStorage =