Bug 250807 [Markers] Delete handler in problems view should spawn a job
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/DeleteHandler.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */