Restore maximized state of window

On Linux and Windows there is a maximized state that isn't the
same as simply restoring the window's size on Mac OS X.

src/atom.coffee

@@ -460,7 +460,8 @@ class Atom extends Model
     setImmediate =>
       @show()
       @focus()
-      @setFullScreen(true) if @workspaceView.fullScreen
+      @setFullScreen(true) if @workspace.fullScreen
+      @maximize() if @workspace.maximized and process.platform isnt 'darwin'
 
   # Public: Close the current window.
   close: ->
@@ -498,6 +499,12 @@ class Atom extends Model
   isFullScreen: ->
     @getCurrentWindow().isFullScreen()
 
+  maximize: ->
+    ipc.send('call-window-method', 'maximize')
+
+  isMaximized: ->
+    @getCurrentWindow().isMaximized()
+
   # Public: Get the version of the Atom application.
   #
   # Returns the version text {String}.

src/workspace.coffee

@@ -56,6 +56,7 @@ class Workspace extends Model
   serializeParams: ->
     paneContainer: @paneContainer.serialize()
     fullScreen: atom.isFullScreen()
+    maximized: atom.isMaximized()
     packagesWithActiveGrammars: @getPackageNamesWithActiveGrammars()
 
   getPackageNamesWithActiveGrammars: ->