Add support for icon to ntfy notification provider (requires minimum ntfy server version 1.28.0 and Android app 1.14.0, no iOS support as of today)

src/languages/en.js

@@ -582,4 +582,5 @@ export default {
     goAlert: "GoAlert",
     backupOutdatedWarning: "Deprecated: Since a lot of features added and this backup feature is a bit unmaintained, it cannot generate or restore a complete backup.",
     backupRecommend: "Please backup the volume or the data folder (./data/) directly instead.",
+    IconUrl: "Icon-URL",
 };