fdo#50415 and fdo#34638 Fix Shortcut names are not localized on Linux

fdo#50415 and fdo#34638 Fix Shortcut names are not localized on Linux

This partially reverts commit 2233aa52da14ec85331aee1163b885fe9a9fb507
and commit 8d9e2d9a211f710e91ac7c607fea25895282d245

Before the keyboard name was used to determine the target language
for translation of UI shortcuts. With this patch the UI locale
is used to determine the language.

Related to:
- 8d9e2d9a211f710e91ac7c607fea25895282d245
- 04b9c2f633f0be1b676933943bdd0b1dc58b5471

Change-Id: Id7ee05ed4065dd4f0c12d283413e97092e95a15f

Gbp-Pq: Name make-shortcuts-in-menus-localized-again.diff