UI: Use hardware encoding by default if available

If the user doesn't use the auto-configuration on first use, set the
default encoders used in simple output mode to hardware encoders.

UI/window-basic-main.hpp

@@ -254,6 +254,7 @@ private:
 	bool          InitService();
 
 	bool          InitBasicConfigDefaults();
+	void          InitBasicConfigDefaults2();
 	bool          InitBasicConfig();
 
 	void          InitOBSCallbacks();