activate_key
Description:
Activates mnemonics and accelerators for this Window.
This is normally called by the default key_press_event handler for toplevel windows, however in some cases it may be useful to call this directly when overriding the standard key handling for a toplevel window.
Parameters:
| this | 
           a Window  | 
      
| event | 
           a EventKey  | 
      
Returns:
| 
           true if a mnemonic or accelerator was found and activated.  |