Picker:Clearable Themes

Build 3590 on feat-input-component-refactoring
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Baseline History
Build 3590393bc87
Current build. There are unaccepted changes, so build 3464 is still the baseline.
Build 3464219a704 current baseline
Accepted by Andrey Yamanov.
Build 3442e2aff73
Auto-accepted
Commenting is disabled because there's a newer build on this branch