Mention that recording has to be restarted to apply changes. Fix stuck in repeat state if pressed while gsr-global-hotkey starts

include/gui/SettingsPage.hpp

@@ -32,6 +32,8 @@ namespace gsr {
         void load();
         void save();
         void on_navigate_away_from_page() override;
+
+        std::function<void()> on_config_changed;
     private:
         std::unique_ptr<RadioButton> create_view_radio_button();
         std::unique_ptr<ComboBox> create_record_area_box();