Implement new bot web-app methods.

Telegram/SourceFiles/export/output/export_output_html.cpp

@@ -1127,6 +1127,8 @@ auto HtmlWriter::Wrap::pushMessage(
 		return data.attachMenu
 			? "You allowed this bot to message you "
 			"when you added it in the attachment menu."_q
+			: data.fromRequest
+			? "You allowed this bot to message you in his web-app."_q
 			: data.app.isEmpty()
 			? ("You allowed this bot to message you when you opened "
 				+ SerializeString(data.app))

Telegram/SourceFiles/export/output/export_output_json.cpp

@@ -477,6 +477,8 @@ QByteArray SerializeMessage(
 	}, [&](const ActionBotAllowed &data) {
 		if (data.attachMenu) {
 			pushAction("attach_menu_bot_allowed");
+		} else if (data.fromRequest) {
+			pushAction("web_app_bot_allowed");
 		} else if (data.appId) {
 			pushAction("allow_sending_messages");
 			push("reason_app_id", data.appId);