crawlers in use

Change-Id: I8025c84aa78c12cbb73e38e1ec87e6a342ede482
v2.2/feature: volume_bar fullscreen button overlap

Change-Id: I1dc98a78cf71592fe6f5a5c305e7a9d49ccdd1e2
tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/13fc272002464ac6a8f06316684d2eac/#7b5142d505284ef5b7e4a3e9e7e8277b