Bug fixes

Fixes an issue with updating to the new database structure when no facilities have been set at either a unit or property level. Thanks to Martijn Haan for identifying this issue and testing the fix.

- Fixed #172475
- Fixed issues discussed in #83063
- Added Russian translation
- Added translation template
- Refactored calendar generation code
- Added support for weeks starting with a day different from Sunday

Bug fixes.

bug fixes:

-install file now includes uninstall functions.
-install function uses {} around database names to ensure proper table creation.

Bugfixes:
- #173599 by sicjoy: empty menu item added.
- Fixed #173538: When submitting a form without changing a hierarchical select's selection, the default value doesn't get saved.
- Fixed a typo.
- Fixed 2 incorrect checks, which prevented content_taxonomy fields inside field groups from being detected.

bug fix