Remove unused additional postinstall dialog code

src/views/apps.html

@@ -46,18 +46,14 @@
         </h5>
       </div>
       <div class="modal-body">
-        <p ng-hide="appInfo.app.appStoreId">
-          This is a custom app and not installed from the App Store and will not receive updates. See the <a target="_blank" ng-href="https://docs.cloudron.io/custom-apps/tutorial/">{{ 'app.docsAction' | tr }}</a>
-          on how to update a custom app.
-        </p>
+        <p ng-hide="appInfo.app.appStoreId" ng-bind-html="'app.appInfo.customAppUpdateWarning' | tr:{ docsLink: 'https://docs.cloudron.io/custom-apps/tutorial/' }"></p>
         <p ng-show="appInfo.app.manifest.documentationUrl" ng-bind-html="'app.appInfo.appDocsUrl' | tr:{ docsUrl: appInfo.app.manifest.documentationUrl, title: appInfo.app.manifest.title, forumUrl: (appInfo.app.manifest.forumUrl || 'https://forum.cloudron.io') }"></p>
 
         <p ng-show="appInfo.app.manifest.addons.email">{{ 'app.appInfo.ssoEmail' | tr }}</p>
         <p ng-show="appInfo.app.sso && !appInfo.app.manifest.addons.email">{{ 'app.appInfo.sso' | tr }}</p>
 
         <a ng-show="appInfo.app.manifest.postInstallMessage" href="" data-toggle="collapse" data-parent="#accordion" data-target="#appinfoPostinstallMessage">
-          <i class="fa fa-angle-right"></i>
-          First time setup instructions
+          <i class="fa fa-angle-right"></i> {{ 'app.appInfo.firstTimeCollapseHeader' | tr }}
         </a>
 
         <div id="appinfoPostinstallMessage" class="panel-collapse collapse">