disable deprecated marked options

to get rid of warnings in the console

modules/ui/init.js

@@ -1,3 +1,4 @@
+import { marked } from 'marked';
 import {
     select as d3_select
 } from 'd3-selection';
@@ -689,5 +690,10 @@ export function uiInit(context) {
             _saveLoading = d3_select(null);
         });
 
+    marked.use({
+        mangle: false,
+        headerIds: false,
+    });
+
     return ui;
 }