Investigate QQmlJSScope's filePath

The filePath of a QQmlJSScope can hold a variety of different values. These values were observed for various types:

• Path to a .qml file in the source folder
• Path to a .qml file in the build folder
• "private/<...>" relative includes
• resource paths
• A simple file name
• Empty string

The content of filePath is inconsistent and cannot really be relied upon.

Maybe a better solution would be to introduce a data structure containing all the known paths of a type. This way the most adequate information can be used.