GT-2524 look into persisting language download progress

[levieggertcru]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 53.43511% with 122 lines in your changes missing coverage. Please review.

Project coverage is 39.88%. Comparing base (e5b189d) to head (7558d45).
Report is 5 commits behind head on develop.

Files with missing lines	Patch %	Lines
...oolLanguageDownloader/ToolLanguageDownloader.swift	22.22%	42 Missing ⚠️
...oader/Cache/RealmToolLanguageDownloaderCache.swift	54.41%	31 Missing ⚠️
...nguageItem/DownloadableLanguageItemViewModel.swift	58.33%	20 Missing ⚠️
.../ToolLanguageDownloader/ToolLanguageDownload.swift	40.00%	12 Missing ⚠️
...nguageItem/DownloadableLanguageDownloadState.swift	0.00%	9 Missing ⚠️
...ainInterface/GetDownloadToolLanguageProgress.swift	60.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2512      +/-   ##
===========================================
+ Coverage    39.80%   39.88%   +0.08%     
===========================================
  Files         1193     1198       +5     
  Lines        59778    59994     +216     
===========================================
+ Hits         23793    23931     +138     
- Misses       35985    36063      +78     

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