Fix wrong viewport height on login iOS

src/pages/page.ts

@@ -5,7 +5,7 @@ export default class Page {
   private installed = false;
 
   constructor(className: string, public isAuthPage: boolean, private onFirstMount?: (...args: any[]) => Promise<any> | void, private onMount?: (...args: any[]) => void, public onShown?: () => void) {
-    this.pageEl = document.body.getElementsByClassName(className)[0] as HTMLDivElement;
+    this.pageEl = document.body.querySelector('.' + className) as HTMLDivElement;
   }
 
   public async mount(...args: any[]) {

src/pages/pageIm.ts

@@ -1,5 +1,6 @@
 //import {stackBlurImage} from '../lib/StackBlur';
 //import appStateManager from "../lib/appManagers/appStateManager";
+import { blurActiveElement } from "../helpers/dom";
 import appStateManager from "../lib/appManagers/appStateManager";
 import Page from "./page";
 
@@ -13,9 +14,13 @@ let onFirstMount = () => {
     m.default.broadcast('im_mount');
   });
 
+  blurActiveElement();
+  return new Promise<void>((resolve) => {
+    window.requestAnimationFrame(() => {
       const promise = import('../lib/appManagers/appDialogsManager');
       promise.finally(async() => {
         //alert('pageIm!');
+        resolve();
     
         //AudioContext && global.navigator && global.navigator.mediaDevices && global.navigator.mediaDevices.getUserMedia && global.WebAssembly;
     
@@ -34,7 +39,9 @@ let onFirstMount = () => {
         Array.from(document.getElementsByClassName('btn-menu-toggle')).forEach((el) => {
           misc.ButtonMenuToggleHandler(el as HTMLElement);
         });
-  })
+      });
+    });
+  });
 
   //let promise = /* Promise.resolve() */.then(() => {//import('../lib/services').then(services => {
     /* fetch('assets/img/camomile.jpg')
@@ -65,8 +72,6 @@ let onFirstMount = () => {
       };
     }); */
   //});
-
-  return promise;
 };
 
 const page = new Page('page-chats', false, onFirstMount);