Mark topics as read on reply from notification.

Telegram/SourceFiles/apiwrap.cpp

@@ -2999,7 +2999,14 @@ void ApiWrap::sharedMediaDone(
 
 void ApiWrap::sendAction(const SendAction &action) {
 	if (!action.options.scheduled) {
-		_session->data().histories().readInbox(action.history);
+		const auto topic = action.topicRootId
+			? action.history->peer->forumTopicFor(action.topicRootId)
+			: nullptr;
+		if (topic) {
+			topic->readTillEnd();
+		} else {
+			_session->data().histories().readInbox(action.history);
+		}
 		action.history->getReadyFor(ShowAtTheEndMsgId);
 	}
 	_sendActions.fire_copy(action);

Telegram/SourceFiles/data/data_forum_topic.cpp

@@ -254,6 +254,10 @@ void ForumTopic::setRealRootId(MsgId realId) {
 	}
 }
 
+void ForumTopic::readTillEnd() {
+	_replies->readTill(_lastKnownServerMessageId);
+}
+
 void ForumTopic::applyTopic(const MTPDforumTopic &data) {
 	Expects(_rootId == data.vid().v);
 

Telegram/SourceFiles/data/data_forum_topic.h

@@ -76,6 +76,7 @@ public:
 	void discard();
 
 	void setRealRootId(MsgId realId);
+	void readTillEnd();
 
 	void applyTopic(const MTPDforumTopic &data);
 

Telegram/SourceFiles/window/window_peer_menu.cpp

@@ -65,7 +65,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_drafts.h"
 #include "data/data_forum.h"
 #include "data/data_forum_topic.h"
-#include "data/data_replies_list.h"
 #include "data/data_user.h"
 #include "data/data_scheduled_messages.h"
 #include "data/data_histories.h"
@@ -134,7 +133,7 @@ void MarkAsReadThread(not_null<Data::Thread*> thread) {
 			}
 		}
 	} else if (const auto topic = thread->asTopic()) {
-		topic->replies()->readTill(topic->lastKnownServerMessageId());
+		topic->readTillEnd();
 	}
 }