Added experimental "Main" dialog tab to properties dialog, added "main" view to some selected
elements to contain the most important / most used properties.
Merge branch 'develop' into dialog_improvements
Updated jquery-ui to 1.11.0
Work in progress on some UI enhancements
Merge branch 'dialog_improvements' into develop
Added delete icon for schema relationships, fixes https://github.com/structr/structr/issues/182