Allow better inspection of Mil units on Combat Screen

[Daza99]

I think it would be helpful on the Pre-combat window (where you choose which forces you want to commit to combat) if we could RMB a unit counter and see its formation info.

Suggestion 1#
Normally (not in combat) we have 5 panel windows showing information about a battalion. The Pre-combat window could just show the 3 in the middle, either the pre-combat window could be moved up to make room for the 3 windows to appear where they are normally or a popup appears.

Suggestion 2#
Another idea could be being able to flag units you want for combat- which adds a yellow flag icon to the counter which is visible in the pre-combat window. Which might be a more simple solution? after combat or clicking cancel these flags disappear.

It would help making better decisions about who to add to the attack, otherwise we are having to click cancel come out of combat window and try to sort out what is what beforehand which isn't always easy to remember, which ones has a mixed formation etc.