logic: improved template argument parsing

* improved the way of gettig a TemplateSpecializationTypeLoc from any TypeLoc to parse template arguments.
* fixed wrong forward mouse button code in app settings.

src/lib/settings/ApplicationSettings.cpp

@@ -158,5 +158,5 @@ int ApplicationSettings::getControlsMouseBackButton() const
 
 int ApplicationSettings::getControlsMouseForwardButton() const
 {
-	return getValue<int>("controls/mouse_forward_button", 0x16);
+	return getValue<int>("controls/mouse_forward_button", 0x10);
 }