[BUGFIX] Page module: Add H1 element for rootpage

Resolves: #63201
Releases: master
Change-Id: I78c942bfb7222637594fc4b93e12bba96b4d787f
Reviewed-on: http://review.typo3.org/34479
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>