window-commands: fix critical when opening about dialog
GLib-GObject-CRITICAL **: 17:38:04.419: ../gobject/gsignal.c:2620: signal 'response' is invalid for instance '0x5575a6def290' of type 'GtkAboutDialog'
Fixes #1897 (closed)
GLib-GObject-CRITICAL **: 17:38:04.419: ../gobject/gsignal.c:2620: signal 'response' is invalid for instance '0x5575a6def290' of type 'GtkAboutDialog'
Fixes #1897 (closed)