Chatview: clicking on the image should not open it in the webview, but in another process

Everything is in the title

changed milestone to %Itération 21

assigned to @sblin

assigned to @atraczyk and unassigned @sblin

added SprintTo review label

mentioned in commit 06fbda77

unassigned @atraczyk

added 1 deleted label and removed SprintTo review label

closed

mentioned in issue #631 (closed)

mentioned in issue #718 (closed)

mentioned in issue #929 (closed)

mentioned in issue #1845 (closed)