[Dominik] [0.16.3] [for 0.17] Tutorials not marked finished unless window reopened

[Dev-iL]

This is a minor presentation issue, where upon finishing a tutorial it isn't marked "green" in the tutorials list unless the window is reopened. This doesn't really affect the gameplay in any way but might seem confusing to some people.

[Dominik]

Okey, fixed, but by a new gui update system that will be in 0.17.