Disable QT keywords to avoid clashes with other libraries. (#5882)

src/widgets/splits/SplitHeader.hpp

@@ -102,7 +102,7 @@ private:
     pajlada::Signals::SignalHolder channelConnections_;
     std::vector<boost::signals2::scoped_connection> bSignals_;
 
-public slots:
+public Q_SLOTS:
     void reloadChannelEmotes();
     void reloadSubscriberEmotes();
     void reconnect();