• move ui into a new gui/resources folder

This is to standardize synfigstudio resources folder like gedit and other gtk apps.

Changes required:

• Move glade files to new proposed folder
• Update CMake and Autotools script

Originally posted by @rodolforg in synfig/synfig#1577 (comment)

Hello, so I have just been recently using Notekit; however, I have ran across a bug where the input system does not properly draw from the tablet when using Wayland. I tested on Xorg, and the input works perfectly, but I am wondering why Wayland seems to have an issue.

It seems that a stroke object is created, but the actually drawing does not work with the input from the tablet leaving a blank

Tests currently generate 47 warnings. It'd be nice to have them fixed.