[poll-view] Added toast when voting in hidden-results poll.

Telegram/Resources/langs/lang.strings

@@ -6853,6 +6853,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_polls_results_in_days#other" = "results in {count} days";
 "lng_polls_ends_in_time" = "ends in {time}";
 "lng_polls_results_in_time" = "results in {time}";
+"lng_polls_results_after_close" = "Results will appear after the poll ends.";
 "lng_polls_retract" = "Retract vote";
 "lng_polls_stop" = "Stop poll";
 "lng_polls_stop_warning" = "If you stop this poll now, nobody will be able to vote in it anymore. This action cannot be undone.";

Telegram/SourceFiles/history/view/media/history_view_poll.cpp

@@ -1331,6 +1331,13 @@ void Poll::updateVotes() {
 			for (auto &answer : _answers) {
 				answer.selected = false;
 			}
+			if (_votedFromHere
+				&& (_flags & PollData::Flag::HideResultsUntilClose)
+				&& !(_flags & PollData::Flag::Closed)) {
+				_parent->delegate()->elementShowTooltip(
+					{ tr::lng_polls_results_after_close(tr::now) },
+					[] {});
+			}
 		} else {
 			_votedFromHere = false;
 			_hasSelected = false;