[B18] Can not override reserved mining jobs

[Calahan]

Fairly straightforward bug, that being that mining jobs can not currently be overridden.

1 - Select a Pawn and order it to mine a mountain tile.
2 - Select another Pawn and attempt to override the above Pawn's mining job.
3 - Result: No right-click menu appears, so there is no option to override the mining job (same applies if the mountain tile is reserved as part of a Pawn's queued orders).

This is the same/similar issue to what is being reported in the following thread: https://ludeon.com/forums/index.php?topic=38792.0 , but I created a new thread for this report in case it's not the same, plus for the usual "one bug, one thread" reasoning.