Fix #1140

Asking for code review.

**By the way**: I don't understand why Github is showing file *src/fe-gtk/fe-gtk.c* as completely replaced. I did replace only 17 strings.

> D:\Documents\Visual Studio\Hexchat>git diff --stat c15b1802717~1 src/fe-gtk/fe-gtk.c
>  src/fe-gtk/fe-gtk.c | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)