hitting escape to exit a "choose upload options" menu closes entire upload dialog

[hexylena]

Describe the bug

Noticed by @dannon during Viz tuto

Galaxy Version and/or server at which you observed the bug
Galaxy Version: (check <galaxy_url>/api/version if you don't know)
Commit: (run git rev-parse HEAD if you run this Galaxy server)

dev

Browser and Operating System
Operating System: Windows, Linux, macOS
Browser: Firefox, Chrome, Chrome-based, Safari

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Additional context
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