fixed errors in dialogs, when button select close main window
fixed style errors in file
added foreign keys in object Tasks
done all FIXME tags in SqlDataSource
fixed error in getReminder
fixed error in getReminder
removed code duplication between AddTaskController and EidtTaskController, null functions replaces with monadic option calls
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replaces setter to constructor parameters in RestrictedText
removed packages goal_dialog child_dialog and parent_dialog
remove wrong testme tags
fixed return null
fixed repeat method output
removed code duplication between MainWindow and LayoutLoader
  inbox_iput fills window  without minWidth
  inbox_iput fills window  without minWidth
created tray icon
added try-catch to MainWindow.addToTasks, changed type of getFactory, added error window
added icon to error window, message to NotImplemented, icon for system tray and finished layout for error window