... except Audacity.h
This forces us to make each header contain all forward declarations or nested
headers that it requires, rather than depend on context.
... Such are not for display to the user. They are appended to menu item
names to identify accelerators, and wxWidgets transforms them appropriately
for the operating system.
... This is distinct from Command, and it abbreviates as the caret ^ character.
Also: show caret instead of "Control" in toolbar button tips, though that
is not done for any default key bindings.
Several other issues were also fixed (hopefully ;-)).
This is a major change to accelerator handling and keyboard
capturing. Menu shortcuts, non-menu commands, label editing,
navigation, and basically anything else were you might use
the keyboard should be thoroughly tested.
