Added toast when limit for note length is reached.

Telegram/Resources/langs/lang.strings

@@ -4802,6 +4802,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_contact_phone_will_be_shared" = "You can make your phone visible to {user}.";
 "lng_contact_add_notes" = "Note";
 "lng_contact_add_notes_about" = "Notes are only visible to you.";
+"lng_contact_notes_limit_reached#one" = "You've reached the contact note limit. Please make the note shorter by {count} character.";
+"lng_contact_notes_limit_reached#other" = "You've reached the contact note limit. Please make the note shorter by {count} characters.";
 "lng_suggest_photo_for" = "Suggest Photo for {user}";
 "lng_suggest_birthday" = "Suggest Date of Birth";
 "lng_suggest_birthday_box_title" = "{user}'s Date of Birth";

Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp

@@ -258,6 +258,22 @@ void Controller::initNameFields(
 			(inverted ? last : first)->showError();
 			return;
 		}
+
+		if (_notesField) {
+			const auto limit = Data::PremiumLimits(
+				&_user->session()).contactNoteLengthCurrent();
+			const auto remove = Ui::ComputeFieldCharacterCount(_notesField)
+				- limit;
+			if (remove > 0) {
+				_box->showToast(tr::lng_contact_notes_limit_reached(
+					tr::now,
+					lt_count,
+					remove));
+				_notesField->setFocus();
+				return;
+			}
+		}
+
 		const auto user = _user;
 		const auto personal = _updatedPersonalPhoto
 			? _updatedPersonalPhoto()