[TASK] Remove the "@todo define visibility" in ext:backend

The "@todo Define visibility" is not very helpful because:

 * Nobody knows what breaks if changing the visibility
 * The code is flooded with todos which makes it hard
   to work with in an IDE

During ACME it was decided to remove the @todo again.

Resolves: #62165
Related: #61957
Releases: master
Change-Id: Id4723c5c366d629fabb114456eebbed746aa9a53
Reviewed-on: http://review.typo3.org/33267
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
[TASK] Improve options for "Simulate backend user"

The option uses the syntax "username (real name)",
however the () are even added if no full name is available.

As a solution, add the () only if a real name is given.

Resolves: #62179
Releases: master
Change-Id: Icbf375574b0399ff37a16df42bc59272a52fb0e4
Reviewed-on: http://review.typo3.org/33277
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>