Bug 122412 Need a scroll bar to display the full description in expression builder
Description: Need a scroll bar to display the full description in expression builder Step to reproduce: 1.Open the expression builder, choose BIRT JS Object->Total Expected result: All the methods and description could be displayed.Since we can't resize the dialog of expression builder, a scroll bar is needed Actual result: The methods and description are truncated due to the limited space (see the sreenshot in attachment)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ExpressionBuilder.java
toolBar.setLayoutData( new GridData( ) );
		ToolItem copy = new ToolItem( toolBar, SWT.NONE );
		copy.setImage( ReportPlatformUIImages
				.getImage( ISharedImages.IMG_TOOL_COPY ) );
		copy.setToolTipText( TOOL_TIP_TEXT_COPY );
		copy.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				sourceViewer.doOperation( ITextOperationTarget.COPY );
			}
		} );
		ToolItem cut = new ToolItem( toolBar, SWT.NONE );
		cut.setImage( ReportPlatformUIImages
				.getImage( ISharedImages.IMG_TOOL_CUT ) );
		cut.setToolTipText( TOOL_TIP_TEXT_CUT );
		cut.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				sourceViewer.doOperation( ITextOperationTarget.CUT );
			}
		} );
		ToolItem paste = new ToolItem( toolBar, SWT.NONE );
		paste.setImage( ReportPlatformUIImages
				.getImage( ISharedImages.IMG_TOOL_PASTE ) );
		paste.setToolTipText( TOOL_TIP_TEXT_PASTE );
		paste.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				sourceViewer.doOperation( ITextOperationTarget.PASTE );
			}