Add theme and boxed-layout settings to API/webinterface settings page

Signed-off-by: DL6ER <dl6er@dl6er.de>

scripts/pi-hole/js/settings.js

@@ -50,7 +50,9 @@ function setConfigValues(topic, key, value) {
         $("#" + escapedKey).append(newopt);
       });
       // Select the current value
-      $("#" + escapedKey + "-" + value.value).trigger("click");
+      $("#" + escapedKey)
+        .val(value.value)
+        .trigger("click");
 
       break;
     }