Issue Summary

cannot remove non-working days from working days tab in board configuration

Steps to Reproduce

1. Create a Board either Scrum or Kanban
2. Step to Configure Board and select Working days tab
3. In Non-working days section, add one or more non-working days
4. Observe that it is not possible to then remove it. Clicking on the X button does nothing:

Nothing is recorded into jira logs and also in the browser console.

This happen in both Chrome and Firefox.

Expected Results

It should be possible to remove the added non-working days

Actual Results

It is not possible to remove the added non-working days

Workaround

Use REST API to remove non-working days:

POST https://<JIRA_URL>/rest/greenhopper/1.0/rapidviewconfig/workingdays/nonworkingday/remove

With body:

{"rapidViewId": <view id>,"iso8601Date":"YYYY-mm-dd"}