[TASK] Add single view for distributions in EM

In order to know what is going to be installed, the
distribution manager should display more information
about a single extension, also with a link to configure
the distribution, if possible.

Releases: 6.2
Resolves: #57212
Change-Id: Ia092ec7b2c5162b33f4fce614415de07ffa2ca47
Reviewed-on: https://review.typo3.org/28677
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel