* use canonical filepath cache in cxx indexer
* made constructors of FilePath explicit
* use FilePath at more places instead of string
* forward declares FilePath wherever possible
- moved LicenseChecker from App to Lib project
- added MessageDispatchWhenLicenseValid. This message takes another message as an argument which is dispatched once the LicenseChecher confirms the current license key or (if the key is invalid) once the user entered a valid key. This message is used when messages are sent that should not be working when no license key has been entered (LoadProject or ActivateTokenLocation via the IDE communication).
- added MessageShowStartScreen which makes the MainView display this screen. This message is also sent via the MessageDispatchWhenLicenseValid.
- removed startup project from appsettings.
* hide start screen when opening with project file
* added project icon file to bundle and file type association to plist
* listen for file open events from double click or drag and drop
* fixed crashes in window handling
malte_langkabel