Do not allow new movements of motor if already moving
Created by: bolmsten
When using the scroll function to move motors it is possible to send hundreds of calls in a matter of seconds.
In this PR I attempt to limit this by setting a motor to moving before making the server request and checking if that motor is in ready state before allowing a new request.
This check should also be done in the server, that could return a 409 or something if a movement is active.