This change integrates the license key ui into the application and makes it necessary for the user to enter a correct
key. The check for a correct key is done on startup and whenever a project is loaded. The check for the key also
includes a check whether the location of the application has changed.
* implemented saving project settings force-refreshes the project if something has changed.
* when nothing has changed while editing the project settings, the project is not refreshed anymore.
* new project window is cleared now before it is displayed.
* re-added gui for c project setup
* ASTVisitor now visits RecordDecls instead of CXXRecordDecls
* prevented endless recursion when parsing struct that is defined in functions signature.
* the key codes for mouse back and forward buttons can be defined in the ApplicationSettings
* fixed only left mouse button allowed for graph interactions
* fixed warnings for overriden node and edge colors
* fixed warnings for edges connecting the wrong node types
* removed tool tip from color scheme
* changed names in project setup screen
Andreas Stallinger