[TASK] Sys_note: Bring headline & delete action icon

To finalze the rebrush of sys notes a section headline is added:
The delete action can be accessed right from the note.

Resolves: #26796
Releases: master
Change-Id: I80923ee523d21880d877a0e1cc9cc2f355f59b3a
Reviewed-on: http://review.typo3.org/32980
Reviewed-by: Felix Kopp <felix-source@phorax.com>
Tested-by: Felix Kopp <felix-source@phorax.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>