5.1.2

BM-21294 : Fix 3 dots button broken. In some cases, particularly when external images were embedded in the message, the ‘3 dots’ button used to unfold the previous message had no effect.
BM-21375: Fixed unwanted infinite updating of the conversation recipient list
BM-21316: Add a treshold to prevent errors on overflow when browser is zoomed.
BM-21316: Prevent overflow calculation on hidden elements.
BM-21316: Check visibility with getBoundingRect.
BM-21318: We cut the text with "..." when there isn't enough space to display it in full in emails with event.
BM-21347: Fix auto-refresh of mailbox folders that was sometimes effective on first and last folders only.

BM-21017: Fix display of phone fields of contacts imported from Google vcards.
BM-21304: Fix: support BM list with < > ; , " in name. Those characters that are invalid for Thunderbird are stripped but original name is saved for updates.

Do not throw "permission denied" for admin0 (occurs when deleting a group).
TROYES-145: The header-<timestamp> files in the /var/spool/bm-hollowed/ directories were not being cleaned up and were accumulating over time. Cleanup was becoming increasingly expensive as BlueMind iterated through more and more files ⇒ BlueMind now deletes header-XXXX files in the same way as snapshot-XXXX files.

Fix the core session, should not be logged-out from eventloop.
When optimising id sets for lookup, only consider unique values and keep ranges as is (outlook might use 97:4294967295).