Created ShortcutRepository which handles
the loading/saving and lifecycle management
of shortcuts. There can only be one shortcut
repository at a time, hence it's mainly static
methods.
Also started down the path of troubleshooting
the profileIcon overlays. The ToBitmapOverlay
still isn't working properly, so I need to figure
out how it was working originally, and how I
broke it :). Then I need to unbreak it.
