talkatu/talkatu

1eb012ecbf93
Use a GtkEventControllerKey to handle the send on return stuff

Testing Done:
Ran the demo and made sure everything was working via `g_message()`'s that I obviously removed.

Reviewed at https://reviews.imfreedom.org/r/1665/
Jefferson Carpenter (negatratoron): logo.png
ivanhoe <ivanhoe@fiscari.de>
Gary Kramlich <grim@reaperworld.com>
Mike Ruprecht <cmaiku@gmail.com>
Elliott Sales de Andrade <quantum.analyst@gmail.com>
Sorvival <sorvival@tutanota.com>