Refactor editor:save-new-version from a mediator event to a normal Backbone event

Part of a push to move away from global subscriptions when 'local' ones will do.

app/schemas/subscriptions/editor.coffee

@@ -4,10 +4,6 @@ module.exports =
   'editor:campaign-analytics-modal-closed': c.object {title: 'Campaign editor analytics modal closed'},
     targetLevelSlug: {type: 'string'}
 
-  'editor:save-new-version': c.object {title: 'Save New Version', description: 'Published when a version gets saved', required: ['major', 'commitMessage']},
-    major: {type: 'boolean'}
-    commitMessage: {type: 'string'}
-
   'editor:view-switched': c.object {title: 'Level View Switched', description: 'Published whenever the view switches'},
     targetURL: {type: 'string'}
 

app/views/editor/article/ArticleEditView.coffee

@@ -16,9 +16,6 @@ module.exports = class ArticleEditView extends RootView
     'click #history-button': 'showVersionHistory'
     'click #save-button': 'openSaveModal'
 
-  subscriptions:
-    'editor:save-new-version': 'saveNewArticle'
-
   constructor: (options, @articleID) ->
     super options
     @article = new Article(_id: @articleID)
@@ -82,7 +79,10 @@ module.exports = class ArticleEditView extends RootView
     return false
 
   openSaveModal: ->
-    @openModalView(new SaveVersionModal({model: @article}))
+    modal = new SaveVersionModal({model: @article})
+    @openModalView(modal)
+    @listenToOnce modal, 'save-new-version', @saveNewArticle
+    @listenToOnce modal, 'hidden', -> @stopListening(modal)
 
   saveNewArticle: (e) ->
     @treema.endExistingEdits()

app/views/editor/modal/SaveVersionModal.coffee

@@ -45,7 +45,7 @@ module.exports = class SaveVersionModal extends ModalView
     if @isPatch then @submitPatch() else @saveChanges()
 
   saveChanges: ->
-    Backbone.Mediator.publish 'editor:save-new-version', {
+    @trigger 'save-new-version', {
       major: @$el.find('#major-version').prop('checked')
       commitMessage: @$el.find('#commit-message').val()
     }

app/views/editor/thang/ThangTypeEditView.coffee

@@ -167,7 +167,6 @@ module.exports = class ThangTypeEditView extends RootView
 
   subscriptions:
     'editor:thang-type-color-groups-changed': 'onColorGroupsChanged'
-    'editor:save-new-version': 'saveNewThangType'
 
   # init / render
 
@@ -590,7 +589,10 @@ module.exports = class ThangTypeEditView extends RootView
     _.delay((-> document.location.reload()), 500)
 
   openSaveModal: ->
-    @openModalView new SaveVersionModal model: @thangType
+    modal = new SaveVersionModal model: @thangType
+    @openModalView modal
+    @listenToOnce modal, 'save-new-version', @saveNewThangType
+    @listenToOnce modal, 'hidden', -> @stopListening(modal)
 
   startForking: (e) ->
     @openModalView new ForkModal model: @thangType, editorPath: 'thang'