Multiple "drive to docking station" missions

[Eddasol]

Describe the bug
When testing the "Send robots to dock" button several "drive to docking station" missions appeared. Sometimes the missions got stuck in the queue and didn't run even though the robots were dismissed from dock.

To Reproduce
Steps to reproduce the behavior:

Expected behavior

Screenshots

[Eddasol]

Setting the status to available through swagger when the missions got stuck worked to get the missions to run again

[andchiind]

We should test that this is still the case since the mechanics have recently been simplified.