Tabs:Lazy Rendering With Render Panel

Build 3437 on feat-item-themes-migration
Reviewing disabled
Baseline History
Build 34378581100
Current build. There are unaccepted changes, so build 3403 is still the baseline.
Build 3403653dc73 current baseline
Accepted by Andrey Yamanov.
Build 3401252313d
Accepted by Andrey Yamanov.
Build 3106ec9b86e
Accepted by Andrey Yamanov.
Build 3104ebcfcd8
Accepted by Andrey Yamanov.
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