Keyboard settings: Change layout and Compose key interfere with each other

Submitted by haarp

Assigned to Jérôme Guelfucci

Link to original bug (#11768)

Description

If a key involved in changing layouts is also selected as the compose key, one cannot change layouts anymore. Compose overrides changing layouts. Examples:

Change layout: Alt+Caps Lock Compose key: Caps Lock -> Changing layout doesn't work

Change layout: Menu Compose Key: Menu -> Doesn't make much sense, and also doesn't work.

this is not immmediately obvious to the end-user. The best solution I think is to gray out or hide keys in the Compose drop-down selector that have already been used in Change layout and vice-versa.

Version: 4.12.0