fix disabling button

part of #758

Author: Dave Conway-Jones

dist/dashboard.appcache

@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# Time: Mon Mar 28 2022 14:57:34 GMT+0100 (British Summer Time)
+# Time: Thu Mar 31 2022 13:57:54 GMT+0100 (British Summer Time)
 
 CACHE:
 i18n.js
@@ -26,4 +26,4 @@ loading.html
 NETWORK:
 *
 
-# hash: 4696b0c80558e6518c079833644fb07e1933b9ce99c2bf24b7e76b2c1798ea85
+# hash: 82b07255eb7513271ca02442365b5e30e51ef0c65011500c7755b9760f8a6b4d