chatview: long displayname in reply

Bug report form

Describe your environment

Please specify the following:

• Jami version: 202401241542 (ubuntu store)

Steps to reproduce

added good-first-issue bug UI/UX labels

mentioned in issue #1551 (closed)

added SprintTo review label

https://review.jami.net/c/jami-client-qt/+/27616

mentioned in commit b0fe0251

closed

removed SprintTo review label