Bug 131484 Can't not add item by click the item from palette
Details: Can't not add item Setp: 1.New a report design and open the palette. 2.Click the lable icon. 3.Move the mouse to layout and click again to add the label. Actual result: Nothing is added in layout.
UI/org.eclipse.birt.report.designer.ui.ide/src/org/eclipse/birt/report/designer/ui/editors/ReportEditorProxy.java
{
			instance.dispose( );
			getSite( ).getWorkbenchWindow( )
					.getPartService( )
					.removePartListener( this );
			instance.removePropertyListener( this );
		}
		instance = null;
	}
	public IWorkbenchPartSite getSite( )
	{
		return instance.getSite( );
	}
	public String getTitle( )
	{
		return this.title;
	}
	public Image getTitleImage( )
	{
		return instance.getTitleImage( );
	}
	public String getTitleToolTip( )
	{
		return instance.getTitleToolTip( );
	}
	public void setFocus( )
	{
		instance.setFocus( );
	}
	public Object getAdapter( Class adapter )