fix: don't translate message on every ajaxify

public/src/admin/admin.js

@@ -2,6 +2,7 @@
 
 (function () {
 	var logoutTimer = 0;
+	var logoutMessage;
 	function startLogoutTimer() {
 		if (app.config.adminReloginDuration <= 0) {
 			return;
@@ -10,11 +11,10 @@
 			clearTimeout(logoutTimer);
 		}
 		// pre-translate language string gh#9046
-		var translated;
-		if (!translated) {
+		if (!logoutMessage) {
 			require(['translator'], function (translator) {
-				translator.translate('[[login:logged-out-due-to-inactivity]]', function (_translated) {
-					translated = _translated;
+				translator.translate('[[login:logged-out-due-to-inactivity]]', function (translated) {
+					logoutMessage = translated;
 				});
 			});
 		}
@@ -22,7 +22,7 @@
 		logoutTimer = setTimeout(function () {
 			bootbox.alert({
 				closeButton: false,
-				message: translated,
+				message: logoutMessage,
 				callback: function () {
 					window.location.reload();
 				},