Bug 23954: Format notes in suggestion management

Bug 23954: Format notes in suggestion management

This patch makes minor CSS and markup changes in order to deliniate
suggestion notes from the other data in the suggestions list view.

To test you should have at least one suggestion with a note. Apply the
patch and go to Acquisitions -> Suggestions.

In the table of suggestions, check that the notes display clearly.

Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 551097f85049c96119038879dfe368611ca87f30)
Signed-off-by: Hayley Mapley <hayleymapley@catalyst.net.nz>
(cherry picked from commit 9e58b147437ed1cce0c6ddca4742c70b1c3b970b)