[TASK] Remove dummy files from ext:rsaauth

Change-Id: I2b063ebeb88f1d059900c1eb75f8c22308753fb3
Resolves: #47795
Related: #47756
Releases: 6.2
Reviewed-on: https://review.typo3.org/20386
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Raise submodule pointer

Change-Id: I0156c664bc24681456eddfcc5cb229a86a4acbce
Reviewed-on: https://review.typo3.org/20387
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Clean-up H1-H4 tag hierarchy in backend

In backend headline tags should follow the semantic hierarchy.
Also for styling of headlines the hierarchy should be clear.

This patch brings semantically correct headline hierarchy for
all core backend modules and functionality: H1 through H4.

Also eases the migration path to include front-end css framework.

Change-Id: If91ec834098752ff4f7c30b0701cace578a2afd1
Fixes: #47785
Releases: 6.2
Reviewed-on: https://review.typo3.org/20373
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn