Fixed a couple more bugs in hints and hint authoring caused by jQuery UI 1.10.0 and jQuery 1.9.0 updates
Upgraded jQuery to version 1.9.1
Fixed bug where ExplanationBuilder steps with completion constraint but without student response box would never remove the constraint

- Also updated constraint behavior to accurately reflect changes in student work
- Fixed bug in menu bar add idea dialog submissions
Merge branch 'master' of https://github.com/WISE-Community/WISE-VLE