Adding ability to translate strings and a fix for .mo file generation

[raivisdejus]

Current version of msgfmt.py is producing .mo files that cause app crash with Latvian translations. Refactored it to use polib that works fine.

Also wrapping some string is translation function to make them translatable

[codecov]

Codecov Report

Attention: Patch coverage is 90.62500% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 74.22%. Comparing base (38f5d26) to head (99ece45).
Report is 2 commits behind head on main.

❗ Current head 99ece45 differs from pull request most recent head f17149b

Please upload reports for the commit f17149b to get more accurate results.

Files	Patch %	Lines
...ferences_dialog/folder_watch_preferences_widget.py	75.00%	2 Missing ⚠️
...ts/preferences_dialog/models_preferences_widget.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #741      +/-   ##
==========================================
- Coverage   81.28%   74.22%   -7.06%     
==========================================
  Files          81       83       +2     
  Lines        3617     3884     +267     
==========================================
- Hits         2940     2883      -57     
- Misses        677     1001     +324     

Flag	Coverage Δ
Linux	74.22% <90.62%> (?)
Windows	?

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[raivisdejus]

Will recreate this PR against branch from original repo, so builds work as expected
#752