Revert "Base: App Circle sidebar (add support Samsung multiwindow flags)"

This reverts commit 0adfc6ba549bf92f6d4cc97f4d7bed2ff6cc1f77.
Revert "Base: App Circle sidebar (add support floating window)"

This reverts commit aa55ec27539739d73491156970ae3cbccfec18f2.
Revert "[1/2] Base: implement App circle sidebar"

This reverts commit b195035ad329efc78c8f2693326a48632f0996d4.