Improvement Request: Split Testing: No confirmation pop-up upon split test deletion

Description: When adding and removing Split Page Test within the landing page editor, its easy to mis-click and delete a page version by accident. To prevent increased rollbacks, it may be good to have a confirmation pendo pop-up for deleting page split tests.

Screenshot: https://i.imgur.com/QcblcMy.png

Steps to Recreate:

1. Open any account > Create a new landing and block from scratch

2. Click into the Split Test button on the top right corner > Enable Split testing

3. Add a couple versions of the page to the split test section

4. Click on one of the trash can icons of one of the pages

5. Notice no warning appears when deleting.