Comment 1 for bug 1380185

Relevant debug info:

Import finished
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
foto: ../../src/xcb_io.c:274: poll_for_event: La declaración `!xcb_xlib_threads_sequence_lost' no se cumple.
Abortado (`core' generado)

Relevant bug in noise with the same problem:

https://bugs.launchpad.net/noise/+bug/1376367

After some research, I discovered that calling X.init_threads(); before Gtk.init solves the problem.

Solution still needs more testing and code inspection, because of that, I will make a merge proposal instead a commit.