Fixed a couple errors.

app/styles/community.sass

@@ -26,9 +26,10 @@
   .lower-titles
     text-align: center
 
-  img
-    border-radius: 20px
-    @include transition( (background-color 0.2s linear, box-shadow 0.2s linear) )
-    &:hover
-      background-color: #7abee3
-      box-shadow: 0 0 20px #7abee3
+  .logo-row, .community-columns
+    img
+      border-radius: 20px
+      @include transition( (background-color 0.2s linear, box-shadow 0.2s linear) )
+      &:hover
+        background-color: #7abee3
+        box-shadow: 0 0 20px #7abee3

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

@@ -441,7 +441,7 @@ module.exports = class ThangsTabView extends CocoView
     else  # Mediator event
       window.thangsTreema = @thangsTreema
       thangData = @thangsTreema.get "id=#{e.thangID}"
-    @editThangView = new LevelThangEditView thangData: thangData, level: @level, world: @world
+    @editThangView = new LevelThangEditView thangData: thangData, level: @level, world: @world, supermodel: @supermodel  # supermodel needed for checkForMissingSystems
     @insertSubView @editThangView
     @$el.find('.thangs-column').hide()
     Backbone.Mediator.publish 'level:view-switched', e

app/views/kinds/RootView.coffee

@@ -6,6 +6,7 @@ CocoView = require './CocoView'
 {logoutUser, me} = require('lib/auth')
 locale = require 'locale/locale'
 
+Achievement = require 'models/Achievement'
 AchievementPopup = require 'views/achievements/AchievementPopup'
 utils = require 'lib/utils'
 
@@ -19,7 +20,7 @@ filterKeyboardEvents = (allowedEvents, func) ->
 
 module.exports = class RootView extends CocoView
   showBackground: true
-  
+
   events:
     'click #logout-button': 'logoutAccount'
     'change .language-dropdown': 'onLanguageChanged'
@@ -71,7 +72,7 @@ module.exports = class RootView extends CocoView
     c = super()
     c.showBackground = @showBackground
     c
-  
+
   afterRender: ->
     super(arguments...)
     @chooseTab(location.hash.replace('#', '')) if location.hash