Replace old cloud logo with cloudron logo in error and no app pages

webadmin/src/error.html

@@ -63,7 +63,7 @@
 
 <div class="wrapper">
     <div class="content">
-        <img ng-src="avatarUrl" onerror="this.src = '/img/logo_inverted_192.png'"/>
+        <img ng-src="avatarUrl" width="128" height="128" onerror="this.src = '/img/logo.png'"/>
         <h1> Cloudron </h1>
 
         <div ng-show="errorCode == 0">

webadmin/src/noapp.html

@@ -28,7 +28,7 @@
 <div class="wrapper">
     <div class="content">
         <h1>
-            <img id="avatar" width="48" height="48" src="/api/v1/cloudron/avatar" onerror="this.src = '/img/logo_inverted_192.png'"/>
+            <img id="avatar" width="48" height="48" src="/api/v1/cloudron/avatar" onerror="this.src = '/img/logo.png'"/>
             <span style="padding-left:10px">Cloudron</span>
         </h1>
         <br/>