* fix: MM-58164 search text hides behind textbox
* clean up unit test for useCollapsibleHeader
* simplify math
* unlock doesn't need to use useCallback as it doesn't have any deps
* revert changes on unlock
* using lockValue & headerOffset directly into children props
* disable scrolling to prevent scrollValue from being updated
* properly snapping flatlist to the proper spot in a few scenarios
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Co-authored-by: Mattermost Build <build@mattermost.com>