Styling of search suggestions is broken when the importer is open

The CSS styles for the import functionality in the administration UI in xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-war/src/main/webapp/resources/js/xwiki/importer/import.css introduces a lot of space in the search suggestions as it contains a style for .legend without any further selectors.

Steps to reproduce:

1. Go to Administer Wiki -> Content -> Import
2. Click the search form and type "xwiki"

Expected results:

The search suggestions are displayed as usual, i.e., the word "in" and the location are in the same line.

Actual results:

The word "in" is displayed in its own line with a lot of margin (see attached screenshot).

I did not check all versions, but I assume this problem is present in all supported versions as the problematic CSS code hasn't been modified recently.