graphical_input: try typing 'hotkey'
    
    OK, neither 'input' nor 'keyboard' actually gives us the Keyboard
    pane, they both give results for uninstalled apps from Software
    :(. 'hotkey' (which is one of the keywords in the .desktop file)
    does seem to work, for now at least, let's try that.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>