Limit the width of comments in the message list

Change-Id: Ia8788f9cb436529b3e1ae58d4a68e4ddd74d5469

polygerrit-ui/app/elements/change/gr-message/gr-message.html

diff --git a/polygerrit-ui/app/elements/change/gr-message/gr-message.html b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
index 287e9e4..3649655 100644
--- a/polygerrit-ui/app/elements/change/gr-message/gr-message.html
+++ b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
@@ -80,6 +80,9 @@
       .content {
         font-family: var(--monospace-font-family);
       }
+      .message {
+        max-width: 80ch;
+      }
       .collapsed .name,
       .collapsed .content,
       .collapsed .message,