Bug 122941 Group interval range resets to 1
1. Create a group based on orders.orderNumber. 2. Specify an interval range of 100. 3. Do not check "Use fixed base value for interval" 4. Preview the report. Report groups on every order number. 5. Open the group editor. The interval range is set to 1.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
{
					slotHandle = inputGroup.getHeader( );
				}
				else if ( inputGroup instanceof TableGroupHandle )
				{
					if ( inputGroup.getHeader( ).getCount( ) != 0 )
					{
						RowHandle rowHandle = ( (RowHandle) inputGroup.getHeader( )
								.get( 0 ) );
						CellHandle cellHandle = (CellHandle) rowHandle.getCells( )
								.get( 0 );
						slotHandle = cellHandle.getContent( );
					}
				}
				if ( slotHandle != null )
				{
					DesignElementHandle dataItemHandle = InsertInLayoutUtil.performInsert( newKeyExpr.trim( ),
							slotHandle,
							inputGroup.getContainer( ) );
					slotHandle.add( dataItemHandle );
				}
			}
			index = intervalType.getSelectionIndex( );
			inputGroup.setInterval( intervalChoices[index].getName( ) );
			if ( index != 0 )
			{
				inputGroup.setIntervalRange( intervalRange.getSelection( ) );
			}
			else
			{