Make join and part messages have user links (#3358)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/common/ChannelChatters.cpp

@@ -2,6 +2,7 @@
 
 #include "messages/Message.hpp"
 #include "messages/MessageBuilder.hpp"
+#include "providers/twitch/TwitchMessageBuilder.hpp"
 
 namespace chatterino {
 
@@ -34,8 +35,9 @@ void ChannelChatters::addJoinedUser(const QString &user)
         QTimer::singleShot(500, &this->lifetimeGuard_, [this] {
             auto joinedUsers = this->joinedUsers_.access();
 
-            MessageBuilder builder(systemMessage,
-                                   "Users joined: " + joinedUsers->join(", "));
+            MessageBuilder builder;
+            TwitchMessageBuilder::listOfUsersSystemMessage(
+                "Users joined:", *joinedUsers, &this->channel_, &builder);
             builder->flags.set(MessageFlag::Collapsed);
             joinedUsers->clear();
             this->channel_.addMessage(builder.release());
@@ -56,8 +58,9 @@ void ChannelChatters::addPartedUser(const QString &user)
         QTimer::singleShot(500, &this->lifetimeGuard_, [this] {
             auto partedUsers = this->partedUsers_.access();
 
-            MessageBuilder builder(systemMessage,
-                                   "Users parted: " + partedUsers->join(", "));
+            MessageBuilder builder;
+            TwitchMessageBuilder::listOfUsersSystemMessage(
+                "Users parted:", *partedUsers, &this->channel_, &builder);
             builder->flags.set(MessageFlag::Collapsed);
             this->channel_.addMessage(builder.release());
             partedUsers->clear();