Bug 103291 Group key doesn't support inputting text
Description: Group key doesn't support inputting text Steps to reproduce: 1.Add a table and bind it with data set 2.Add a group to the table: enter a row name in the "Group On:" textbox 3.Save and preview Expected result: Everything is OK Actual result: Error occurs because the group key is added as a string not a expression
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
inputGroup.clearContents( GroupHandle.FOOTER_SLOT );
					}
				}
			}
			if ( ascending.getSelection( ) )
			{
				inputGroup.setSortDirection( DesignChoiceConstants.SORT_DIRECTION_ASC );
			}
			else
			{
				inputGroup.setSortDirection( DesignChoiceConstants.SORT_DIRECTION_DESC );
			}
			
			inputGroup.setTocExpression( UIUtil.convertToModelString( tocEditor.getText( ),
					true ) );
		}
		catch ( SemanticException e )
		{
			ExceptionHandler.handle( e );
			return;
		}
		setResult( inputGroup );
		super.okPressed( );
	}
	/**
	 * Returns the internal type index by its value.
	 * 
	 * @param interval
	 */
	private int getIntervalTypeIndex( String interval )