Steps to reproduce the behavior

1. Click on the "+ New" button to make a new card
2. Immediately close the modal without making any changes

Expected behavior

A card isn't created automatically unless the user enters some text or makes some changes. It feels too easy to accidentally create cards that you didn't mean to.

Screenshots (optional)

Edition and Platform

• Edition: Mattermost Boards on community.mattermost.com
• Version: v7.2.1