Add determining keyboard layout from Wayland #1807
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Summary of changes
Adds a Linux keyboard layout option "wayland-auto" that retrieves the current keyboard layout from the running Wayland compositor. Uses the xkbcommon package to parse the keymap, as well as to generate the other keyboard layout options.
Solves #1726 but only for Wayland users.
Another limitation is that keyboard capture isn't using the retrieved layout. This means keyboard modifiers other than the standard QWERTY keys (for example mapping CapsLock to Ctrl) won't be handled properly when passing through keyboard shortcuts. This issue exists currently so new issues shouldn't be added and this PR should be ready to merge.
Pull Request Checklist
Changes have testsLinux specific changes