Fix possible crash in application shutdown.

Telegram/SourceFiles/data/data_chat_filters.cpp

@@ -246,6 +246,11 @@ not_null<Dialogs::MainList*> ChatFilters::chatsList(FilterId filterId) {
 	return pointer.get();
 }
 
+void ChatFilters::clear() {
+	_chatsLists.clear();
+	_list.clear();
+}
+
 void ChatFilters::setPreloaded(const QVector<MTPDialogFilter> &result) {
 	_loadRequestId = -1;
 	received(result);

Telegram/SourceFiles/data/data_chat_filters.h

@@ -113,6 +113,7 @@ public:
 	void refreshHistory(not_null<History*> history);
 
 	[[nodiscard]] not_null<Dialogs::MainList*> chatsList(FilterId filterId);
+	void clear();
 
 	const ChatFilter &applyUpdatedPinned(
 		FilterId id,

Telegram/SourceFiles/data/data_session.cpp

@@ -388,6 +388,7 @@ void Session::clear() {
 	for (const auto &[id, folder] : _folders) {
 		folder->clearChatsList();
 	}
+	_chatsFilters->clear();
 	_histories->clearAll();
 	_webpages.clear();
 	_locations.clear();