Avoid to have multiple path saving the config. This fixes an error check
miss when the window is being closed and the user requested the config
to be written.
Reported-by: NHiromu Yakura <hiromu1996@gmail.com>
Pointed-out-by: NMichal Marek <mmarek@suse.cz>
Signed-off-by: NMichal Marek <mmarek@suse.cz>