Improve the version sheet

This is small improvements for the version sheet:

1. Have Library Reference and Library Version Reference on the same line
2. Disable the Library Configuration when editing the version page. It should be only available to edit in-place
3. Hide the pen icon next to the titles (Version Configuration, Libraries Configuration, New Configuration) if possible
4. The library version selector should be greyed out, and then un-greyed only when the library reference is set.