Rebased to main.

Rebased to main to fix merge conflicts.

Rebased and added markers to "Backspace" too.

@afmenez
Thank you for your continued efforts.
Regarding the changes in this PR, I believe they are not strictly necessary.
They appear to be more personal preferences rather than bug fixes or improvements.
To avoid unnecessary changes in the Git history, I would prefer not to include them.
I appreciate your contribution.

@SoftFever, this patch solves real issues for translators:

• Some instances of the key names were not marked for translation;
• Some key names were spelled in different ways ("Alt+" and "Alt +"), causing the need to translate the same name more than once;
• Each key combination ("Shift+A" and "Shift+Q" ) needed to be translated separately, now only the key names need to be translated once;

Rebased to main to fix merge conflicts.