Saved army does not save "contained" structure

[Henri]

While testing the how to get artillery to be 1 per battalia I came ont he idea to save the army file I make so I don't have to add my test subjects all the time again.
However I noticed the army file doesn't retain the structure of contained units. E.g. creating a horse battalia and adding artillery to that will when loading the file move the artillery to the artillery category. Also the contained units in a category will be separated and not listed as nested anymore, eg the Ordnance battalia won't have the attached artillery commander or guns nested after loading.

[ibboard]

Appears that the army file contains it, we just don't load it again.

[IBBoard <dev@…>]

In dc13cef2bc2bd31208b2b2205ff30991e6dcd4b5/IBBoard.WarFoundry.GUI.GTK:

Re #420: Saved army does not save "contained" structure

• Make sure GTK# UI loads nesting correctly

[ibboard]

Also fixed by r00d6cf940c3c/IBBoard.WarFoundry.API