[velux] Add action to set shade and vane tilt positions simultaneously

[andrewfg]

Issue

For venetian blinds pull request #12618 adds support for commanding the vane tilt position in addition to the shade position. During testing of that functionality we discovered that if one sends a vane position command followed shortly by a shade position command (or vice versa) then the second command causes the first command to be cancelled. This problem is most problematic when the two commands are issued by a single rule.

Solution

We need to add an 'Action' to the binding that would enable rules to set both shade and vane tilt positions simultaneously.

[openhab-bot]

This issue has been mentioned on openHAB Community. There might be relevant details there:

https://community.openhab.org/t/velux-new-openhab2-binding-feedback-welcome/32926/1489