Remove 'locale' parameter from all callbacks

The locale parameter was a mistake, because it puts extra needless
burden upon the module developer to have to handle this variable for
each and every single callback function.  The parameter is being removed
in favor of a single centralized module callback function that
specifically updates locale information for a module only when needed.

obs/window-basic-settings.cpp

@@ -212,8 +212,7 @@ void OBSBasicSettings::LoadServiceTypes()
 	size_t        idx = 0;
 
 	while (obs_enum_service_types(idx++, &type)) {
-		const char *name = obs_service_getdisplayname(type,
-				App()->GetLocale());
+		const char *name = obs_service_getdisplayname(type);
 		QString qName = QT_UTF8(name);
 		QString qType = QT_UTF8(type);
 
@@ -229,8 +228,7 @@ void OBSBasicSettings::LoadServiceInfo()
 	QLayout          *layout    = ui->streamContainer->layout();
 	obs_service_t    service    = main->GetService();
 	obs_data_t       settings   = obs_service_get_settings(service);
-	obs_properties_t properties = obs_service_properties(service,
-			App()->GetLocale());
+	obs_properties_t properties = obs_service_properties(service);
 
 	delete streamProperties;
 	streamProperties = new OBSPropertiesView(
@@ -480,9 +478,9 @@ void OBSBasicSettings::LoadAudioDevices()
 	const char *output_id = App()->OutputAudioSource();
 
 	obs_properties_t input_props = obs_get_source_properties(
-			OBS_SOURCE_TYPE_INPUT, input_id, App()->GetLocale());
+			OBS_SOURCE_TYPE_INPUT, input_id);
 	obs_properties_t output_props = obs_get_source_properties(
-			OBS_SOURCE_TYPE_INPUT, output_id, App()->GetLocale());
+			OBS_SOURCE_TYPE_INPUT, output_id);
 
 	if (input_props) {
 		obs_property_t inputs  = obs_properties_get(input_props,