ui: added universal font size setting and shortcuts for changing it

This change adds font size and font family to the ApplicationSettings to have a single point for manipulating them. The
font size can also be changed via the menu or the zoomIn and zoomOut shortcuts on all platforms.

src/lib/Application.h

@@ -48,6 +48,8 @@ private:
 
 	std::shared_ptr<MainView> m_mainView;
 	std::shared_ptr<ComponentManager> m_componentManager;
+
+	bool m_isInitialParse;
 };
 
 #endif // APPLICATION_H