Bug 120216 Group dialog should be showed even dataset is not set.
- Add a table report item - do not set the data set - try creating a new table group. - An error is shown Expected behavior - As part of the template requirements, we dont want UI to do the validation. User should be able to go and define a group, even if the dataset is not defined.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
IWorkbenchPage pg = pgs[i];
					if ( pg != null )
					{
						IEditorPart editor = pg.getActiveEditor( );
						if ( editor != null
								&& editor.getEditorInput( ) instanceof IReportEditorInput )
						{
							if ( editor instanceof AbstractMultiPageLayoutEditor )
							{
								return (AbstractMultiPageLayoutEditor) editor;
							}
						}
					}
				}
			}
		}
		return null;
	}
	/**
	 * Returns the current active editor part in current active page or current
	 * active workbench.
	 * 
	 * @param activePageOnly
	 *            If this is true, only search the current active page, or will
	 *            search all pages in current workbench, returns the first
	 *            active editor part or null if not found.
	 * @return the current active editor part, or null if no editor part is
	 *         active.
	 */
	public static IEditorPart getActiveEditor( boolean activePageOnly )