Fix a few join confirmations too many

src/ChatPage.cpp

@@ -901,13 +901,16 @@ void
 ChatPage::joinRoom(const QString &room)
 {
         const auto room_id = room.toStdString();
-        joinRoomVia(room_id, {});
+        joinRoomVia(room_id, {}, false);
 }
 
 void
-ChatPage::joinRoomVia(const std::string &room_id, const std::vector<std::string> &via)
+ChatPage::joinRoomVia(const std::string &room_id,
+                      const std::vector<std::string> &via,
+                      bool promptForConfirmation)
 {
-        if (QMessageBox::Yes !=
+        if (promptForConfirmation &&
+            QMessageBox::Yes !=
               QMessageBox::question(
                 this,
                 tr("Confirm join"),

src/ChatPage.h

@@ -105,7 +105,9 @@ public slots:
         void leaveRoom(const QString &room_id);
         void createRoom(const mtx::requests::CreateRoom &req);
         void joinRoom(const QString &room);
-        void joinRoomVia(const std::string &room_id, const std::vector<std::string> &via);
+        void joinRoomVia(const std::string &room_id,
+                         const std::vector<std::string> &via,
+                         bool promptForConfirmation = true);
 
         void inviteUser(QString userid, QString reason);
         void kickUser(QString userid, QString reason);