[SOGo] Use JS for mailcow logout

data/Dockerfiles/sogo/navMailcowBtns.diff

@@ -7,14 +7,10 @@
 <     </md-button>
 <     <md-button class="md-icon-button"
 83c76
-<                onclick="document.getElementById('mc_logout').setAttribute('action', '/'); document.getElementById('mc_logout').submit();"
+<                onclick="mc_logout();"
 ---
 >                ng-show="::activeUser.path.logoff.length"
 85c78
 <                ng-href="#">
 ---
 >                ng-href="{{::activeUser.path.logoff}}">
-89,91d81
-<     <form method="POST" id="mc_logout" action="user">
-<       <input type="hidden" name="logout" value="1">
-<     </form>

data/conf/sogo/custom-sogo.js

@@ -5,6 +5,16 @@ document.addEventListener('DOMContentLoaded', function () {
         window.location.href = '/user';
     }
 });
+// logout function
+function mc_logout() {
+    fetch("/", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/x-www-form-urlencoded"
+        },
+        body: "logout=1"
+    }).then(() => window.location.href = '/');
+}
 
 // Custom SOGo JS