Module source folder not stored in the .jucer file

If a relative path is given for “Module source folder” it should be remembered as a relative path in the .jucer file and not turned into an absolute path stored in the registry. Optionally, a checkbox can be added to keep the path relative and .jucer-file specific.

The problem is that my .jucer files are not portable, even though the JUCE subtree is included in my repository.