Fix: Prevent using localization API before initialization

It could happen that the window.Typo3Neos.I18n.translate has been used before the initialization
flag was set. This change prevents this.

fix #26

Resources/Private/Javascript/Main.js

@@ -1,26 +1,39 @@
 import 'core-js/stable'
 import 'regenerator-runtime/runtime'
-import { UserModule, UserMenu } from './Components'
-import { isNil } from './Helper'
+import {UserModule, UserMenu} from './Components'
+import {isNil} from './Helper'
 
 document.addEventListener('DOMContentLoaded', function () {
-    const userModuleContainer = document.querySelector(
-        '.neos-module-administration-users'
-    )
-    if (!isNil(userModuleContainer)) {
-        Array.from(userModuleContainer.querySelectorAll('.neos-table')).forEach(
-            (_userModule) => {
-                if (!isNil(_userModule)) {
-                    new UserModule(_userModule)
+    const initialize = () => {
+        const userModuleContainer = document.querySelector(
+            '.neos-module-administration-users'
+        )
+        if (!isNil(userModuleContainer)) {
+            Array.from(userModuleContainer.querySelectorAll('.neos-table')).forEach(
+                (_userModule) => {
+                    if (!isNil(_userModule)) {
+                        new UserModule(_userModule)
+                    }
                 }
-            }
+            )
+        }
+
+        const userMenuContainer = document.querySelector(
+            '#neos-top-bar .neos-user-menu'
         )
+        if (!isNil(userMenuContainer)) {
+            new UserMenu(userMenuContainer)
+        }
     }
 
-    const userMenuContainer = document.querySelector(
-        '#neos-top-bar .neos-user-menu'
-    )
-    if (!isNil(userMenuContainer)) {
-        new UserMenu(userMenuContainer)
+    if (window.Typo3Neos.I18n.initialized) {
+        initialize()
+    } else {
+        const interval = setInterval(() => {
+            if (window.Typo3Neos.I18n.initialized) {
+                clearInterval(interval)
+                initialize()
+            }
+        }, 50)
     }
 })

Resources/Private/Javascript/Templates/ImpersonateButton.js

@@ -1,11 +1,11 @@
 import {isNil} from "../Helper"
 
 const impersonateIcon = '<i class="fas fa-random icon-white"></i>'
-const localizedTooltip = !isNil(window.Typo3Neos) ?
-    window.Typo3Neos.I18n.translate('tooltip.impersonateUserButton', 'Login as this user', 'Unikka.LoginAs') :
-    'Login as this user';
 
 const ImpersonateButton = (identifier, disabled) => {
+    const localizedTooltip = !isNil(window.Typo3Neos) ?
+        window.Typo3Neos.I18n.translate('tooltip.impersonateUserButton', 'Login as this user', 'Unikka.LoginAs') :
+        'Login as this user';
     const attributesObject = {
         'data-neos-toggle': 'tooltip',
         'title': localizedTooltip,