Bug#990316: Add GLFW_IM_MODULE=fcitx on ibus and fcitx5 to enable IME in kitty

[Gunnar Hjalmarsson <gunnarhj@debian.org>]

Control: tag -1 patch

Thanks for your patch, Chen Shijie. As Osamu said, adding that variable 
would be trivial and without a risk to affect other applications.

Reading <https://github.com/kovidgoyal/kitty/issues/469> makes me still 
hesitate, though. If I understand it correctly, the principal kitty 
developer has intentionally not enabled IME input by default due to 
claimed efficiency issues and bugs.

im-config works the other way around. As soon as some input method 
framework such as IBus or fcitx5 is installed, im-config sets the 
related variables and launches the daemon. And it does so by default.

In the light of that, I'm wondering if letting im-config set 
GLFW_IM_MODULE is the right thing to do.

--
Regards,
Gunnar Hjalmarsson