No save button when there's nothing to save. Messing with AudioPlayer playSound API a bit.

app/lib/AudioPlayer.coffee

@@ -78,8 +78,9 @@ class AudioPlayer extends CocoClass
       @preloadInterfaceSounds [name] unless filename of cache
       @soundsToPlayWhenLoaded[name] = volume
 
-  playSound: (name, volume=1) ->
-    createjs.Sound.play name, {volume: (me.get('volume') ? 1) * volume}
+  playSound: (name, volume=1, delay=0) ->
+    instance = createjs.Sound.play name, {volume: (me.get('volume') ? 1) * volume, delay: delay}
+    instance
 
 #  # TODO: load Interface sounds somehow, somewhere, somewhen
 

app/lib/surface/CocoSprite.coffee

@@ -475,6 +475,6 @@ module.exports = CocoSprite = class CocoSprite extends CocoClass
     return null unless sound
     delay = if withDelay and sound.delay then 1000 * sound.delay / createjs.Ticker.getFPS() else 0
     name = AudioPlayer.nameForSoundReference sound
-    instance = createjs.Sound.play name, "none", delay, 0, 0, volume
+    instance = AudioPlayer.playSound name, volume, delay
 #    console.log @thang?.id, "played sound", name, "with delay", delay, "volume", volume, "and got sound instance", instance
     instance

app/templates/editor/level/save.jade

@@ -52,3 +52,7 @@ block modal-body-content
           label.control-label(for=id + "-version-is-major") Major Changes?
           input(id=id + "-version-is-major", name="version-is-major", type="checkbox")
           span.help-block (Could this update break anything depending on this System?)
+
+if noSaveButton
+  block modal-footer-content
+    button.btn(data-dismiss="modal", data-i18n="common.cancel") Cancel

app/views/editor/level/save_view.coffee

@@ -23,6 +23,7 @@ module.exports = class LevelSaveView extends SaveVersionModal
     context.levelNeedsSave = @level.hasLocalChanges()
     context.modifiedComponents = _.filter @supermodel.getModels(LevelComponent), @shouldSaveEntity
     context.modifiedSystems = _.filter @supermodel.getModels(LevelSystem), @shouldSaveEntity
+    context.noSaveButton = context.levelNeedsSave or context.modifiedComponents.length or context.modifiedSystems.length
     context
 
   shouldSaveEntity: (m) ->