FR: Add notification when LocalisedStrings mapping changes

It would be nice if the system provided a callback of some kind to react to mapping changes/when switching to a new language.

I’m guessing that I’m not the only one that’s had to roll a custom solution to notify the UI to update itself.

There are probably more extensive and well rounded ways of solving updating the text through a complex application, but adding such a notification would be a step in the right direction imo.

+1 for this!