ui.backend.gtk: fix (grab-input) and (ungrab-input)
ui.backend.gtk: fix (grab-input) and (ungrab-input)

erg/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,erg/factor,erg/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,erg/factor