Semi-standardize usage of icons in many mission panels
* Question mark: Decision / user input
* Exclamation mark: Tutorial message / information
* Hedgehog: Mission introduction
* -amSkip: Mission failure
* Star: Mission success / end of game
f3e903ace2d3
Make hedgewars frontend not change scheme/weps to Default if script cfg doesn't match a known scheme. That is, will leave on whatever is selected. Also set a bunch of schemes where we don't care what the scheme/weps are to *