treeviews no longer select the first item on a page load without an item param
+ GroupDetail block
  + Default for GroupType should be
    + emptystring when zero or more than one option (and warning when saving blank)
    + select one option when exactly one option
  + Parent Downdrop should be limited to Parents that have GroupTypes (parents that are allowed to have children)
  + Put Delete button to right of Edit button.  Have a Confirm message on Delete (maybe same as Grids warning message)
Merge remote-tracking branch 'refs/remotes/origin/develop' into develop