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/dialogs/SettingsDialog.hpp

@@ -60,6 +60,7 @@ private:
 
     void onOkClicked();
     void onCancelClicked();
+    void addShortcuts() override;
 
     struct {
         QWidget *tabContainerContainer{};