Updates for ThangsList refreshing its Thangs.

app/views/play/level/tome/thang_list_view.coffee

@@ -52,7 +52,7 @@ module.exports = class ThangListView extends View
     super()
     @addThangListEntries()
 
-  addThangListEntries: (forThangs) ->
+  addThangListEntries: ->
     @entries = []
     for [thangs, section, permission] in [
       [@readwriteThangs, "#readwrite-thangs", "readwrite"]  # Your Minions
@@ -60,7 +60,7 @@ module.exports = class ThangListView extends View
       [@muggleThangs, "#muggle-thangs", null]  # Non-Castable
     ]
       section = @$el.find(section).toggle thangs.length > 0
-      for thang in thangs when not forThangs or thang in forThangs
+      for thang in thangs
         spells = _.filter @spells, (s) -> thang.id of s.thangs
         entry = new ThangListEntryView thang: thang, spells: spells, permission: permission, supermodel: @supermodel
         section.find('.thang-list').append entry.el  # Render after appending so that we can access parent container for popover
@@ -72,11 +72,11 @@ module.exports = class ThangListView extends View
       return entry.spells[0]
     null
 
-  adjustThangs: (spells, thangs, toRemove, toAdd) ->
-    for entry in @entries when _.find toRemove, {id: entry.thang.id}
+  adjustThangs: (spells, thangs) ->
+    @spells = @options.spells = spells
+    for entry in @entries
       entry.$el.remove()
       entry.destroy()
-    @spells = @options.spells = spells
-    @thangs = @options.thangs = _.filter thangs, 'isSelectable'
+    @thangs = @options.thangs = thangs
     @sortThangs()
-    @addThangListEntries toAdd
+    @addThangListEntries()

app/views/play/level/tome/tome_view.coffee

@@ -67,12 +67,10 @@ module.exports = class TomeView extends View
       console.warn "Warning: There are no Programmable Thangs in this level, which makes it unplayable."
 
   onNewWorld: (e) ->
-    oldThangs = @thangList.thangs
-    newThangs = e.world.thangs
-    toRemove = (thang for thang in oldThangs when not e.world.getThangByID thang.id)
-    toAdd = (thang for thang in newThangs when not _.find oldThangs, id: thang.id)
-    @createSpells toAdd, e.world
-    @thangList.adjustThangs @spells, newThangs, toRemove, toAdd
+    thangs = _.filter e.world.thangs, 'isSelectable'
+    programmableThangs = _.filter thangs, 'isProgrammable'
+    @createSpells programmableThangs, e.world
+    @thangList.adjustThangs @spells, thangs
     @spellList.adjustSpells @spells
 
   createSpells: (programmableThangs, world) ->