Add missing tips text for source selection buttons

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@21959 ef53c05b-3124-4d59-ae7d-fe3273f42be7
Adapt to new file tree layout standards

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@21960 ef53c05b-3124-4d59-ae7d-fe3273f42be7