Don't use deprecated features

src/base/bittorrent/session.cpp

@@ -1850,8 +1850,8 @@ bool Session::deleteTorrent(const TorrentID &id, const DeleteOption deleteOption
     }
 
     // Remove it from torrent resume directory
-    const QString resumedataFile = QString::fromLatin1("%1.fastresume").arg(torrent->id());
-    const QString metadataFile = QString::fromLatin1("%1.torrent").arg(torrent->id());
+    const QString resumedataFile = QString::fromLatin1("%1.fastresume").arg(torrent->id().toString());
+    const QString metadataFile = QString::fromLatin1("%1.torrent").arg(torrent->id().toString());
     QMetaObject::invokeMethod(m_resumeDataSavingManager, [this, resumedataFile, metadataFile]()
     {
         m_resumeDataSavingManager->remove(resumedataFile);
@@ -3928,7 +3928,7 @@ void Session::handleTorrentResumeDataReady(TorrentImpl *const torrent, const std
     // Separated thread is used for the blocking IO which results in slow processing of many torrents.
     // Copying lt::entry objects around isn't cheap.
 
-    const QString filename = QString::fromLatin1("%1.fastresume").arg(torrent->id());
+    const QString filename = QString::fromLatin1("%1.fastresume").arg(torrent->id().toString());
     QMetaObject::invokeMethod(m_resumeDataSavingManager
         , [this, filename, data]() { m_resumeDataSavingManager->save(filename, data); });
 }

src/gui/rss/automatedrssdownloader.cpp

@@ -187,7 +187,7 @@ void AutomatedRssDownloader::loadFeedList()
     {
         QListWidgetItem *item = new QListWidgetItem(feed->name(), m_ui->listFeeds);
         item->setData(Qt::UserRole, feed->url());
-        item->setFlags(item->flags() | Qt::ItemIsUserCheckable | Qt::ItemIsTristate);
+        item->setFlags(item->flags() | Qt::ItemIsUserCheckable | Qt::ItemIsAutoTristate);
     }
 
     updateFeedList();

src/gui/torrentcontentmodel.cpp

@@ -386,7 +386,7 @@ Qt::ItemFlags TorrentContentModel::flags(const QModelIndex &index) const
 
     Qt::ItemFlags flags {Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable};
     if (itemType(index) == TorrentContentModelItem::FolderType)
-        flags |= Qt::ItemIsTristate;
+        flags |= Qt::ItemIsAutoTristate;
     if (index.column() == TorrentContentModelItem::COL_PRIO)
         flags |= Qt::ItemIsEditable;