Add option to create, delete and resize buttons, loaders and scrollers during runtime, using mouse / keyboard

[AlexLamson]

Maybe: pressing esc triggers editing mode editing mode = a little red Button is added to the top right/left corner of every Menu & a little gray button (blank) is added to the bottom right corner clicking on the red button deletes the Menu clicking and dragging the gray button changes the size of the Menu (xSize and ySize)