MissionTree: Asking for beacon update.
Temporary fix for sending all beacons to vehicle.
The problem was by adding a new beacon, it was not added to the "right map" (the only map from the mission).
The ConsoleSystem added maps to the MapGroup (not to mission) to be used by the tail element for each vehicle.
In this situation the first map of the MapGroup was not the "right map".
So the new beacon was added to the "wrong map".
We sometimes ask for elements in the mission and sometimes to the mapGroup, that in this situation did not give the same result, And the problems appear.
In the ConsoleSystem was removed adding the tails maps to the map group, the tail still works.
For now seems to work.
(Join commit with Paulo Dias.)