Interpret comma as decimal point in editor

[rumangerst]

Operating system or device - Godot version:
Linux (Manjaro) - v2.2 alpha (git custom build)

Issue description (what happened, and what was expected):
If you use a German keyboard layout (and maybe other layouts), the "decimal point" is a comma. If you insert numbers into the editor's fields (e.g. the translation) it would be nice if this comma would be automatically replaced by a decimal point. Blender does the same and it this little fix would enhance the workflow.

Steps to reproduce:

Link to minimal example project (optional but very welcome):

[RayKoopa]

Should this get closed? A previous PR implementing this (as far as I can see) has been merged.

[akien-mga]

Yep, fixed by #13240.