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.partBroughtToTop( part );
	}
	public void partClosed( IWorkbenchPart part )
	{
		
		
		if ( part == this )
		{
			SessionHandleAdapter.getInstance( ).clear( instance.getModel( ) );
		}
	}
	public void partDeactivated( IWorkbenchPart part )
	{
		instance.partDeactivated( part );
	}
	public void partOpened( IWorkbenchPart part )
	{
		instance.partOpened( part );
	}
	public void propertyChanged( Object source, int propId )
	{
		firePropertyChange( propId );
	}
	public IEditorPart getEditorPart( )
	{
		return instance;
	}
}