Tabs:Keep Mounted

Build 2899 on improve-tabs
Reviewing disabled
Baseline History
Build 2899fa57f3e
Current build. There are unaccepted changes, so build 2889 is still the baseline.
Build 2889044f219 current baseline
Accepted by Andrey Yamanov.
Build 286336783e8
Accepted by Andrey Yamanov.
Build 28427068925
Auto-accepted
Commenting is disabled because there's a newer build on this branch