Shared vision: Can't ungarrison from allied structures

[elexis]

If you garrisson a unit into an allied building, then you can't ungarrisson it anymore, since the entity will be hidden and only its mirage will be shown.

If you use the developers overlay, enable and disable the reveal-map feature, then both entity and mirage will be shown (two health point bars and both structures selectable).

Expected Result: You can control all your units, and therefore be able to ungarrisson from the building. If you garrissoned that building then you should be able to see the original entity and also have its level of sight.