Agile Wallboard gadget truncated in Firefox

Issue Summary

The Agile wallboard gadget when created does not render properly within Firefox. The bottom section of the gadget is truncated and you're unable to scroll or view anything outside of the standard box

Environment

Jira 8.0.2

Steps to Reproduce

1. Create a new dashboard
2. Add the Agile wallboard gadget
3. Ensure you have enough issue present to cause scrolling
4. View the gadget within a Firefox browser

Expected Results

You will be able to see all the issues within the gadget.

Actual Results

You only see a sample section of the data, scrolling is not available.

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Notes

(Optional - If Necessary)

Workaround

This is currently only impactful for Firefox, you may use Chrome or IE11 to view the gadget.