Bug 35862: Display modal search results to the right of form above 1200px

Bug 35862: Display modal search results to the right of form above 1200px

To test:
1. Apply patch
2. Rebuild CSS ( yarn build )
3. Look at some of the places where there is a modal patron search.
    -suggestion/suggestion.pl: Set to patron
    -members/memberentry.pl: Add guarantor

4. Make sure the modal looks good before and after you have searched for a patron.
5. Play with many different screen sizes, ensuring everything looks good and makes sense.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>