When creating an action, Studio ignore values for properties whose name has more than one word

(can't find a valid title, sorry)

1. Have a custom element, for example nuxeo-my-element
2. In this element, declare a property, camelCase with more than a word. For example: selectedItems:

   <script>
       Polymer({
         is: 'nuxeo-my-element',
         properties: {
           selectedItems: Object,
         . . .
   

1. Create a new action using this element
2. The designer correctly suggests the selected-items property
3. But it is not saved to the bundled, it is ignored./ The bundle just has <nuxeo-my-element><nuxeo-my-element>, no properties

Not problem with properties which have a single word.

Workaround: Manually edit the -bundle.html and explicitly add . . .selected-items="[[selectedItems]]". . .

Prioriy: Major because it is not obvious. You create the action, save, don't re-open it to check if the values were saved, you deploy, does not work, etc.