Change rename torrents shortcut to plain constant

Author: keizie

src/ui/screens/mainwindow/mainwindow.cpp

@@ -641,7 +641,7 @@ namespace tremotesf {
                 //: Torrent's context menu item
                 qApp->translate("tremotesf", "&Rename")
             );
-            mRenameTorrentAction->setShortcuts(QKeySequence::listFromString("F2"));
+            mRenameTorrentAction->setShortcut(Qt::Key_F2);
             QObject::connect(mRenameTorrentAction, &QAction::triggered, this, [this] {
                 const auto indexes = mTorrentsView.selectionModel()->selectedRows();
                 if (indexes.size() == 1) {