rkwarddev: added support for source_property argument of varslots and valueslots

git-svn-id: https://svn.code.sf.net/p/rkward/code@4958 7936002b-cd1d-0410-9ce3-d7ebf93b5162
Start adjusting the code to actually look up translations, where appropriate

git-svn-id: https://svn.code.sf.net/p/rkward/code@4959 7936002b-cd1d-0410-9ce3-d7ebf93b5162
Further tweak file context extraction

git-svn-id: https://svn.code.sf.net/p/rkward/code@4960 7936002b-cd1d-0410-9ce3-d7ebf93b5162
rkwarddev: fixed some copy&paste bugs, added support for "allow_duplicates" (varslot/valueslot) and let roxygen clean the docs

git-svn-id: https://svn.code.sf.net/p/rkward/code@4961 7936002b-cd1d-0410-9ce3-d7ebf93b5162
Also try to resolve the label of elements that are referred to by id (from <setting> elements in .rkh-files)


git-svn-id: https://svn.code.sf.net/p/rkward/code@4962 7936002b-cd1d-0410-9ce3-d7ebf93b5162