Fill empty space on translation and licences screen

[flofriday]

Checklist

• I have used the search function for OPEN issues to see if someone else has already submitted the same feature request.
• I have also used the search function for CLOSED issues to see if the feature was already implemented and is just waiting to be released, or if the feature was rejected.
• I will describe the problem with as much detail as possible.
• This request contains only one single feature, not a list of multiple (related) features.

App version

3.3.2f (develop branch)

Where did you get the app from

Other

Problem you may be having, or feature you want

The translation and licences screen both reserve empty space for an image but are never called with an URL to display such an image.

Suggested solution

Since no image will be displayed we don't need to reserve space here.

Screenshots / Drawings / Technical details

Screenshots (before/after):

Technical Details:
I already implemented the change in the SimpleIconListAdapter and will open the PR if the feature gets approved.
The image only is hidden if the imageUrl is null, which means that for the Contributors and the Special thanks screens nothing changes.