[TASK]  Adjust module icons and app-icon viewport

* create crisp icons
* full tone color schema
* streamline icons
* enhance module menu styling
* remove focus outline
* make focus visible for keyboard navigation

Resolves: #63193
Resolves: #63192
Releases: master

Kudos: Benjamin Kott, Mathias Schreiber, Dirk Lipjes,
Frank Nägler, Felix Kopp

Change-Id: I10e718c5e6107f8552770f1727bd6f95f8b994f2
Reviewed-on: http://review.typo3.org/34690
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>