Emits the "mnemonic-activate" signal. The default handler for this signal activates the widget if group_cycling is FALSE, and just grabs the focus if group_cycling is TRUE.
TRUE if there are other widgets with the same mnemonic
TRUE if the signal has been handled
See Implementation
Emits the "mnemonic-activate" signal. The default handler for this signal activates the widget if group_cycling is FALSE, and just grabs the focus if group_cycling is TRUE.