Improve layout of Spotlights list

This MR improves the layout of the Spotlights list by taking care of that all elements occupy consistent spacing. This MR changes:

• green notification message on top has now same width as the spotlight entries
• spotlight images and text always occupy the same space

For a quick impression compare the before and after images:

Before

After

assigned to @jandt-desy

requested review from @konrad

@konrad @jandt-desy please have a look at the new layout. If both of you approve, I'd be happy to see my MR merged. Thank you :)

approved this merge request

approved this merge request

resolved all threads

mentioned in commit 14409f80

merged