Move to Gtk.Headerbar

[982c80311320c1b]

I think making these changes is all that is needed:

Gtk.HeaderBar header_bar;
header_bar = new Gtk.HeaderBar ();
header_bar.set_title ("Cable");
main_window.set_titlebar (header_bar);

[Julien Spautz (julien-spautz)]

I guess this only makes sense if we put something into the headerbar. Join, part and appmenu are probably the most important ones. In that case we could also remove the inline toolbar in the bottom left.

[982c80311320c1b (alexander-wilms)]

Maybe a toggle for the user list could also be added there:

Mockups of an IRC client using a Headerbar: https://wiki.gnome.org/Design/Apps/Potential/Polari?action=AttachFile&do=get&target=Polari.png

[Julien Spautz (julien-spautz)]

Seems like a good idea to me. I dislike those inline toolbars in lists. Too small and too distant.

I also agree on the user list toggle, this would be a good location.

I'll give it a try and then we can decide if it should be merged or not.