Issue: Search preview is cluttered by image titles

The wiki search engine is titled 'find a wiki page'. This means that it should search for wiki articles. Naturally there are many images in the system. Entering a wiki title or part of a wiki title will show many image titles in the search preview. This is not useful.
Please disable this or allow us to disable it. It should be possible to search for wiki articles only without getting image results.
Or alternatively wiki titles should always be shown first / on top of the search preview.