QA:Lots Of Tabs Tabstrip

Build 14018 on editable-cell-bug
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Baseline History
Build 14018144880f
Current build. There are unaccepted changes, so build 13911 is still the baseline.
Build 139106c2ac34
Accepted by Josh Wooding.
Build 135598ab989f
Accepted by Josh Wooding.
Build 1353567d858e
Accepted by Josh Wooding.
Commenting is disabled because there's a newer build on this branch