BRANCH 4.2-021:
  passed the search_key of each bar to GanttCbk so it doesn't have to rely on index to save the dates for each gantt bar
  added sorting of the bars according to pipeline order if the gantt bars search type is sthpw/task
  removed the multiple mode as retrieving the search key to save is now the default
4.1-021: added functionality to allow @GET to get prev_data and update_data to use to notify users of what has been changed by email. Note: use .__all__ to get all fields updated.

4.1-021: improve the way that dictionaries are displayed
BRANCH 4.1:
   added relationship="code" to the connection between project and project_type