Accept Backspace and Delete keys with modifiers as valid shortcuts.
Accept Backspace and Delete keys with modifiers as valid shortcuts.

When recording a new shortcut using the MASShortcutView control,
the user may press Delete or Backspace to clear the current shortcut.
In the previous versions the corresponding code branch didn’t test
the modifier flags, making it impossible to record shortcuts such
as Cmd-Alt-Delete. Now the control should behave as expected, only
using “naked” Delete and Backspace keys to clear the shortcut.

shpakovski/MASShortcut,MacPaw/MASShortcut,shpakovski/MASShortcut,baz/MASShortcut,MacPaw/MASShortcut,shpakovski/MASShortcut,ianyh/MASShortcut,mpapp/MASShortcut