* Always add compiler header path when prefilling on first start, regardless of successful detection
* Show compiler header path in path list box on top and readonly
* Prepend compiler header path on Windows in system header path compiler flags, append otherwise
* Show warning when saving ApplicationSettings if compiler header path is not in global include paths
* Show warning when saving ApplicationSettings if there is another path containing compiler headers
* updated version of fallback ApplicationSettings.xml to current settings version
* removed is-empty-check when pre-filling settings at the first start of Sourcetrail
* moved sample projects from data to user folder
* added fallback files for app and window settings
* implemented copying app and window settings to user folder when not found on app startup
* fixed upgrading for windows installer