This attribute allows you to specify the modifier key(s) for this accelerator item. This
can be a combination of the following predefined values:
None-
Don't use any modifier key. This is the default.
Ctrl-
Add the control key to the modifier keys.
Alt-
Add the alt key to the modifier keys.
Cmd-
Add the command key to the modifier keys. This is only supported on macOS and AmigaOS.
Shift-
Add the shift key to the modifier keys.
If you specify more than one modifier key, you have to separate the individual keys by
a semicolon, e.g. "ctrl;shift".
When using modifier keys, the keyboard shortcut will only trigger if the modifier key(s) and
the main key are both down. This is useful for monitoring key combinations like CTRL+V
for pasting data, etc.