Revision 1778

* Fantasia: Improved look and feel
* Fantasia: Added buttons for increasing/decreasing the key number
  of the MIDI keyboard (Ctrl+Up Arrow/Ctrl+Down Arrow)
* Fantasia: Added buttons for scrolling left/right on the MIDI keyboard
  (Ctrl+Left Arrow/Ctrl+Right Arrow)
* Added key bindings for triggering MIDI notes using the computer keyboard
  (from a to ' for the white keys and from 0 to 7 for changing the octaves)
* Notes are now triggered when dragging the mouse over the MIDI keyboard