Bug 118780 Set alias for columns in data set but in expression builder still shows the old columns name when select the dataset.
Description: Set alias for columns in data set but in expression builder still shows the old columns name when select the dataset. Steps to reproduce: 1. New a datasource and a dataset 2. Set alias of the first column in the dataset to "column1". 3. Insert a data item and bind it to dataset. 4. In the expression builder, select the dataset and double click the first column name. Expected result: According to scr #78193 in tracker, the first column in expression build should use alias name instead of original name. Actual result: The original name of the first column was listed in the below of expression builder but the alias name appeared above as row["column1"] after double click the original name.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ExpressionProvider.java
return IMAGE_STATIC_METHOD;
				}
				return IMAGE_METHOD;
			}
			if ( info instanceof IMemberInfo )
			{
				if ( ( (IMemberInfo) info ).isStatic( ) )
				{
					return IMAGE_STATIC_MEMBER;
				}
				return IMAGE_MEMBER;
			}
		}
		else if ( element instanceof DataSetItemModel )
		{
			return IMAGE_COLUMN;
		}
		else if ( element instanceof DesignElementHandle )
		{
			return ReportPlatformUIImages.getImage( element );
		}
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.ui.dialogs.IExpressionProvider#getInsertText(java.lang.Object)
	 */
	public String getInsertText( Object element )
	{