Following #2028: also add test to mirrorInSamePart
Fix #1065 regression with data: scheme

- use of Connection had broken this, as Connection didn't support data:
- so added data: support to Connection
Minor: refactor, indent, comment
Merge branch 'master' of https://github.com/orbeon/orbeon-forms into issue595
Properly show read-only label, fix #2030
Fix #2032 "Dynamic itemset shows empty in Summary page"
Fix error on selecting draft, fix #2033
Caused by implementation of #2009
view and edit default values on itemset dialog
Merge branch 'master' of https://github.com/orbeon/orbeon-forms into issue595