Confluence Page Gadget page/space select autocomplete control redirects to the item instead of selecting it

The Confluence Page Gadget doesn't autocomplete in JIRA when trying to enter the Space or Page name. Instead, when clicking in the options drop-down it takes you to the Confluence's space/page.

Steps to Reproduce:

1. Create an Application Link between JIRA and Confluence;
2. Add a Confluence Page Gadget to a dashboard;
3. Try to auto-complete the name of the page;
4. Click on one of the options shown.

Expected Behavior:
The name of the page would be entered in the Page field.

Actual Behavior:
The option redirects to the page or space in Confluence. Trying to type the whole name of the page usually won't work either, making it impossible to use the gadget.