code-editor: increase autocomplete popup size

public/sass/components/_code_editor.scss

@@ -18,6 +18,7 @@
   background-color: $dropdownBackground !important;
   color: $dropdownLinkColor !important;
   border: 1px solid $dropdownBorder !important;
+  width: 320px !important;
 
   font-family: monospace;
   font-size: 1rem;