Always use global rootView object

This removes the last few places where rootView was
looked up via jQuery selector and instead just uses
the rootView property available on the window.

src/app/editor.coffee

@@ -57,7 +57,7 @@ class Editor extends View
   newSelections: null
   redrawOnReattach: false
 
-  @deserialize: (state, rootView) ->
+  @deserialize: (state) ->
     editor = new Editor(mini: state.mini, deserializing: true)
     editSessions = state.editSessions.map (state) -> EditSession.deserialize(state, rootView.project)
     editor.pushEditSession(editSession) for editSession in editSessions
@@ -101,7 +101,7 @@ class Editor extends View
     isFocused: @isFocused
 
   copy: ->
-    Editor.deserialize(@serialize(), @rootView())
+    Editor.deserialize(@serialize(), rootView)
 
   bindKeys: ->
     editorBindings =
@@ -356,7 +356,7 @@ class Editor extends View
       false
 
     @hiddenInput.on 'focus', =>
-      @rootView()?.editorFocused(this)
+      rootView?.editorFocused(this)
       @isFocused = true
       @addClass 'is-focused'
 
@@ -483,7 +483,7 @@ class Editor extends View
     return unless @closedEditSessions.length > 0
 
     {path, index} = @closedEditSessions.pop()
-    @rootView().open(path)
+    rootView.open(path)
     activeIndex = @getActiveEditSessionIndex()
     @moveEditSessionToIndex(activeIndex, index) if index < activeIndex
 
@@ -782,9 +782,6 @@ class Editor extends View
   pane: ->
     @parent('.pane').view()
 
-  rootView: ->
-    @parents('#root-view').view()
-
   promptToSaveDirtySession: (session, callback) ->
     path = session.getPath()
     filename = if path then fs.base(path) else "untitled buffer"

src/app/grammar-view.coffee

@@ -45,5 +45,5 @@ class GrammarView extends SelectList
   attach: ->
     super
 
-    @editor.rootView()?.append(this)
+    rootView.append(this)
     @miniEditor.focus()

src/app/pane.coffee

@@ -43,7 +43,7 @@ class Pane extends View
 
     pane = new Pane(view)
     this[side](pane)
-    @rootView().adjustPaneDimensions()
+    rootView.adjustPaneDimensions()
     view.focus?()
     pane
 
@@ -51,7 +51,6 @@ class Pane extends View
     return super if keepData
     # find parent elements before removing from dom
     parentAxis = @parent('.row, .column')
-    rootView = @rootView()
     super
     if parentAxis.children().length == 1
       sibling = parentAxis.children().detach()
@@ -62,6 +61,3 @@ class Pane extends View
     switch axis
       when 'row' then new PaneRow
       when 'column' then new PaneColumn
-
-  rootView: ->
-    @parents('#root-view').view()

src/packages/autocomplete/lib/autocomplete-view.coffee

@@ -73,7 +73,7 @@ class AutocompleteView extends SelectList
 
     @editor.abort()
     @editor.setSelectedBufferRange(@originalSelectionBufferRange)
-    @editor.rootView()?.focus() if @miniEditor.isFocused
+    rootView.focus() if @miniEditor.isFocused
 
   attach: ->
     @editor.transact()

src/packages/symbols-view/lib/tag-reader.coffee

@@ -11,7 +11,7 @@ find: (editor) ->
   word = editor.getTextInRange(editor.getCursor().getCurrentWordBufferRange())
   return [] unless word.length > 0
 
-  tagsFile = @getTagsFile(editor.rootView().project)
+  tagsFile = @getTagsFile(rootView.project)
   return [] unless tagsFile
 
   $tags.find(tagsFile, word) or []