Moving Azimuth and Elevation simultaneously causes jitter in the web UI

[dh1tw]

Whenever either azimuth or elevation are updated, a struct containing both (azimuth AND elevation) are sent to the clients connected through the web server. This causes under some circumstances jitter in the (red) direction needle since the values are not always exactly synchronized.

This behavior can be reproduced with the dummy rotator model.

Probably it would make more sense to only send the values which have actually changed to the connected Web browsers.

[dh1tw]

fixed in version v0.5.2