Revert "Do not reset disabled items if there was no previous stagemode"

This reverts commit 54ac6a49dd9b4860eb406e1e9db85e0743dc5771.
Revert "SLE-11ed the code"

This reverts commit 25fb2223f212a97319e89075b6fd62d4930de017.
Revert "Re-enabling all disabled items (steps, proposals) if stagemode has changed"

This reverts commit 64b41346f7d6d6c52c9d6704fa7a500bbc99b4b2.
Updated changes file and a new version