Fix logic for showing custom dismiss confirmation popup

Problem

 On the issue creation page after entering some data when pressed Esc or closed the page, the Warning pop doesn't show up. 

Environment

Jira cloud

Steps to Reproduce

On the issue creation page after entering some data when pressed Esc or closed the page, the Warning pop doesn't show up. This is after the new rollout here.

Expected Results

A warning pop screen should be displayed.

Actual Results

A pop screen doesn't appear and data entered in create issue screen is lost

Workaround

No workaround is available at the moment

Notes