LT-14387 Use RFC5646 language tag for new projects, not ICU Locale

Change-Id: Ia1468d455eb68f26d33b1823dcdb0ebbd4ef1425
Add tooltip for Send/Reveid toolbar icon

LT-14339

Change-Id: I2f9d08d3dc4cbfc0b9ce933a681c8533f73d5a96
LT-14377, forbid share my projects with wrong ProjectsFolder

1. Share my projects cannot be turned on unless ProjectsFolder as seen
by this user is the same as the one (based on HKLM) seen by the
FwRemoteDatabaseConnectorService.

2. Even if it is turned on, this doesn't take effect if the folders
are different. This allows a different user with a personal projects
folder to keep working.

3. Fixed some problems with the way updating styles was forcing a
Save in the middle of a UOW, resulting in duplicate DB4O objects.
This is unrelated, but I had to fix it to test the new code.

Change-Id: I01a5dae68322a7431e6edf94ff36d1b2aa74c8ba
Improved the warning report during LT-14316 investigation

The warning for missing referants in a LIFT file will now appear
only once per import instead of once for each incomplete reference.

Change-Id: I414f895350e1ff4f1b77175185417bd2ac16206e