Added ellipsis for longer usernames.

Towards #7281

Signed-off-by: Abijeet <abijeetpatro@gmail.com>

apps/comments/css/comments.scss

@@ -159,11 +159,16 @@
 .atwho-view-ul * .avatar-name-wrapper {
 	white-space: nowrap;
 }
-
 #commentsTabView .comment .author,
 #commentsTabView .comment .date {
 	opacity: .5;
 }
+#commentsTabView .comment .author {
+	max-width: 210px;
+	text-overflow: ellipsis;
+	overflow: hidden;
+	white-space: nowrap;
+}
 #commentsTabView .comment .date {
 	margin-left: auto;
 	/** this is to fix the tooltip being too close due to the margin-top applied