Robot should try small motions if it looses docking contacts

[greymfm]

If robots detects loosing docking contacts, it should try small motions to re-dock.

[autoditac]

Please keep in mind a scenario where the docking station might be mounted on a slightly uphill terrain, where the mower has a tendency to roll off the docking station if the motors are not "pushing" Alfred back into position. This happened to me after I manually corrected Alfreds wrong position in the dock (as shown in the photo). Alfred reported charging and afterwards lost contact again. Seems it moved a little out of the dock, a slight push on Alfreds back fixed it. Tilt of the terrain is something like 10% in my case.