Remove iOS theme in favor of plain light/dark themes

js/debug_log_start.js

@@ -5,7 +5,7 @@ $(document).on('keyup', function(e) {
 });
 
 const $body = $(document.body);
-$body.addClass(window.theme);
+$body.addClass(`${window.theme}-theme`);
 
 // got.js appears to need this to successfully submit debug logs to the cloud
 window.setImmediate = window.nodeSetImmediate;