Shade can be stopped while in sync move

[mposzywak]

Currently after power outage the shade must be manually moved up or down to sync. During that sync move the shade can be stopped with physical button and after stopping the tilt can be adjusted. This results in different states being reported in the node/home-assistant apps.

While the shade sync move is not finished there should be no possibility to adjust the tilt with physical buttons (this way it could be an indicator that the shade is in unsynced state)