Properly clear restriction cache
1.99.54 test
Fixed translation
Updated Slovak translation
Updated Russian translation. New and corrections.
Updated Russian translation. New and corrections.
Fixed submitting restrictions

Closes #1452
System server will create database folder

Refs #1437
Merge pull request #1451 from pylerSM/patch-24

Updated Slovak translation
Merge pull request #1453 from define/patch-17

Updated Russian translation. New and corrections.
Updated changelog
1.99.55 test
Log stack for invalid restrictions (support info)
Simplify alter table syntax for better compatibility (support info)
More compatible database upgrade (2)
1.99.56 test
Fix Dalvik warning
Remove now incorrect comment
Filter exception not caused by XPrivacy