PLT-5151 Show jewel with only mentions on mobile (#5004)

webapp/components/notify_counts.jsx

@@ -13,7 +13,7 @@ function getCountsStateFromStores() {
 
     teamMembers.forEach((member) => {
         if (member.team_id !== TeamStore.getCurrentId()) {
-            count += ((member.msg_count || 0) + (member.mention_count || 0));
+            count += (member.mention_count || 0);
         }
     });
 
@@ -27,8 +27,6 @@ function getCountsStateFromStores() {
             count += channel.total_msg_count - channelMember.msg_count;
         } else if (channelMember.mention_count > 0) {
             count += channelMember.mention_count;
-        } else if (channelMember.notify_props.mark_unread !== 'mention' && channel.total_msg_count - channelMember.msg_count > 0) {
-            count += 1;
         }
     });