Fix mark as unread websocket (#28145)

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/channel.go

@@ -2720,7 +2720,7 @@ func (a *App) MarkChannelAsUnreadFromPost(c request.CTX, postID string, userID s
 		return channelUnread, model.NewAppError("MarkChannelAsUnreadFromPost", "app.channel.update_last_viewed_at_post.app_error", nil, "", http.StatusInternalServerError).Wrap(nErr)
 	}
 
-	a.sendWebSocketPostUnreadEvent(c, channelUnread, postID, false)
+	a.sendWebSocketPostUnreadEvent(c, channelUnread, postID)
 	a.UpdateMobileAppBadge(userID)
 
 	return channelUnread, nil
@@ -2756,7 +2756,7 @@ func (a *App) markChannelAsUnreadFromPostCRTUnsupported(c request.CTX, postID st
 			return channelUnread, model.NewAppError("MarkChannelAsUnreadFromPost", "app.channel.update_last_viewed_at_post.app_error", nil, "", http.StatusInternalServerError).Wrap(nErr)
 		}
 
-		a.sendWebSocketPostUnreadEvent(c, channelUnread, postID, true)
+		a.sendWebSocketPostUnreadEvent(c, channelUnread, postID)
 		a.UpdateMobileAppBadge(userID)
 		return channelUnread, nil
 	}
@@ -2829,17 +2829,15 @@ func (a *App) markChannelAsUnreadFromPostCRTUnsupported(c request.CTX, postID st
 	if nErr != nil {
 		return channelUnread, model.NewAppError("MarkChannelAsUnreadFromPost", "app.channel.update_last_viewed_at_post.app_error", nil, "", http.StatusInternalServerError).Wrap(nErr)
 	}
-	a.sendWebSocketPostUnreadEvent(c, channelUnread, postID, false)
+	a.sendWebSocketPostUnreadEvent(c, channelUnread, postID)
 	a.UpdateMobileAppBadge(userID)
 	return channelUnread, nil
 }
 
-func (a *App) sendWebSocketPostUnreadEvent(c request.CTX, channelUnread *model.ChannelUnreadAt, postID string, withMsgCountRoot bool) {
+func (a *App) sendWebSocketPostUnreadEvent(c request.CTX, channelUnread *model.ChannelUnreadAt, postID string) {
 	message := model.NewWebSocketEvent(model.WebsocketEventPostUnread, channelUnread.TeamId, channelUnread.ChannelId, channelUnread.UserId, nil, "")
 	message.Add("msg_count", channelUnread.MsgCount)
-	if withMsgCountRoot {
-		message.Add("msg_count_root", channelUnread.MsgCountRoot)
-	}
+	message.Add("msg_count_root", channelUnread.MsgCountRoot)
 	message.Add("mention_count", channelUnread.MentionCount)
 	message.Add("mention_count_root", channelUnread.MentionCountRoot)
 	message.Add("urgent_mention_count", channelUnread.UrgentMentionCount)