Removed translation of distance units
Merge pull request #2654 from triakcz/fix_units_untranslatable

Removed translation of distance units
refactor project names and references

* rename test project from "cgeo-os-test" to "cgeo-test"
* update referenced projects, as there is no "cgeo-os" project in our
workspace
* this should solve the calendar plugin build issues
fixes #2651 - exclude inaccessable dirs from choice
Merge pull request #2656 from marco-jacob/fixNPESimpleDirChooser

fixes #2651 - exclude inaccessable dirs from choice
updated translation-it to feb-24
Merge pull request #2658 from RomNexus6/patch-39

updated translation-it to feb-24
cherry-picked PR from RomNexus6 patch-38
Merge pull request #2661 from marco-jacob/pickedItPR

cherry-picked PR from RomNexus6 patch-38
Stores caches for offline use by an ongoing service.

WIP
Offloaded cache downloading to a separate thread...

...such that multiple calls to the cache downloader will add all download
of caches for offline use to the same queue.

BUG: Currently multiple downloader threads are started, and the notification
will flicker between the two threads.