Move document mutation to startEditorWindow

src/atom.coffee

@@ -247,14 +247,6 @@ class Atom extends Model
   #
   # Call after this instance has been assigned to the `atom` global.
   initialize: ->
-    @setBodyPlatformClass()
-
-    {devMode, safeMode, resourcePath} = @getLoadSettings()
-    configDirPath = @getConfigDirPath()
-
-
-    document.head.appendChild(new StylesElement)
-
     if grammarOverridesByPath = @state.grammars?.grammarOverridesByPath
       @grammars.grammarOverridesByPath = grammarOverridesByPath
 
@@ -577,6 +569,9 @@ class Atom extends Model
 
     @loadConfig()
     @themes.loadBaseStylesheets()
+
+    @setBodyPlatformClass()
+    document.head.appendChild(new StylesElement)
     @packages.loadPackages()
     @deserializeEditorWindow()
 

src/menu-manager.coffee

@@ -191,7 +191,10 @@ class MenuManager
 
   # Get an {Array} of {String} classes for the given element.
   classesForElement: (element) ->
-    element?.classList.toString().split(' ') ? []
+    if classList = element?.classList
+      Array::slice.apply(classList)
+    else
+      []
 
   sortPackagesMenu: ->
     packagesMenu = _.find @template, ({label}) -> MenuHelpers.normalizeLabel(label) is 'Packages'

src/package.coffee

@@ -132,7 +132,6 @@ class Package
     @activationPromise ?=
       new Promise (resolve, reject) =>
         @resolveActivationPromise = resolve
-        @rejectActivationPromise = reject
         @measure 'activateTime', =>
           try
             @activateResources()
@@ -370,10 +369,8 @@ class Package
         console.error "Error serializing package '#{@name}'", e.stack
 
   deactivate: ->
-    @rejectActivationPromise?()
     @activationPromise = null
     @resolveActivationPromise = null
-    @rejectActivationPromise = null
     @activationCommandSubscriptions?.dispose()
     @deactivateResources()
     @deactivateConfig()