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
{
	private static class Operator
	{
		/**
		 * The tooltip of the operator
		 */
		public String tooltip;
		/**
		 * The symbol of the operator
		 */
		public String symbol;
		/**
		 * The text to insert into the source viewer
		 */
		public String insertText;
		Operator( String symbol, String tooltipKey )
		{
			this.symbol = symbol;
			insertText = symbol;
			this.tooltip = Messages.getString( tooltipKey );
		}
		Operator( String symbol, String tooltipKey, String insertText )
		{
			this( symbol, tooltipKey );
			this.insertText = insertText;
		}
	}
	private static final String[] OPERATORS_ON_BAR = new String[]{
			"+",