[cleanup] Use Comparator.comparing Done with the JDT UI cleanup action. Change-Id: Ibdb80cce2094679610af32d4973ed1f061c53cc9 Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.team/+/183555 Tested-by: Platform Bot <platform-bot@eclipse.org>