Fix T47228: Ghost not handling predictably keycodes when first keymap is non-latin.

Fix T47228: Ghost not handling predictably keycodes when first keymap is non-latin.

Why this is not working in original code and works int this one remains mystery
(see comments for details).

Note that we still do not support at all non-latin keymaps for our shortcuts,
this would be nice to add someday, but that's a TODO, not a bug.

Reviewers: sergey, campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D1746