main project as root or not

  not find in their respective stores

- Added default configuration for columns in
  intranet-gantt-editor

  when failed to load store

  sprint on the same location (one of them being the background...)

  clicking on "Task Name" column header

  when maximizing the Gantt editor

  in order to avoid the renderer failing.
  A failing renderer leads to a missing <td> which leads to an error
  when collapsing a row.

- Added editor for (plain) lists of Catagories

  for reporting the result of a store loading.
- Modified GanttTreePanel:
  Now returns errors in a tbar instead of an ad_return_complaint which
  breaks the JavaScript code

  - Added display of cross-project overassignment
  - Removed Scheduling menu (now showing cross-project overassignment)
  - Added models and stores for absences
  - Modified GanttBarPanel to work as ADP with JavaScript MIME-Type