Defines available methods for Dialog context.
Some context still with Asynchronous command system.
All methods have a optional arguments named handler to allow
callback definition.
public function showFileOpenDialog(caption:String, filter:FileFilterCollection, multipleSelect:Boolean, handler:Delegate):StringOpens a File open chooser dialog.
public function showFileSaveDialog(caption:String, filterList:FileFilterCollection, fileName:String, handler:Delegate):StringOpens a File save chooser dialog.