Add custom hotkeys. (#2340)

Co-authored-by: LosFarmosCTL <80157503+LosFarmosCTL@users.noreply.github.com>
Co-authored-by: Paweł <zneix@zneix.eu>
Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/widgets/splits/Split.hpp

@@ -114,6 +114,7 @@ private:
     void channelNameUpdated(const QString &newChannelName);
     void handleModifiers(Qt::KeyboardModifiers modifiers);
     void updateInputPlaceholder();
+    void addShortcuts() override;
 
     /**
      * @brief Opens Twitch channel stream in a browser player (opens a formatted link)
@@ -168,6 +169,7 @@ public slots:
     void openInStreamlink();
     void openWithCustomScheme();
     void copyToClipboard();
+    void startWatching();
     void setFiltersDialog();
     void showSearch();
     void showViewerList();