When having long ticket name, you have some issues in mono-ticket registration
mode. Indeed as space is somehow limited, the "Qty <select>" part takes two
lines, which is quite ugly.
In this commit we ensure the Qty selector always takes one single line. We also
ensure long ticket name takes several lines and are displayed completely. We
also fix borders of optional price, so that a multi-line ticket name does not
generate borders with different size left and right of price.
Related to testing of EventOnline
Task ID-2314778
Fwd port of PR #55625
PR #55642
Thibault Delavallée
112c87d8cd