Revert "Remove animation"

This reverts commit 88a1351422834f54475077389348601e2f6331e6.
Revert "Remove rambar"

This reverts commit def17cfc1ef1986cf30d19b615b6dd5f5c47d3f2.
Revert "Fix FC error"

This reverts commit ba09ba1dc6864ed986d128b48e6afe505c054a5e.
Revert "Hide button when it have only one task"

This reverts commit 2248fbdfac96230dbd8d0ccdf42924abf2e117d4.