[TASK] Redesign "about modules" as start screen

Adds visual containers for icons on about modules for
easier access. About Modules will be the start screen.

Also extends the width of the module.

Change-Id: Ib9edcdc6240e6b9480029d4d3c341cef9af0c844
Resolves: #52517
Releases: 6.2
Reviewed-on: https://review.typo3.org/24349
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn