Submit button does not work when viewport height is too low

[Firebird1029]

Describe the bug
When the window viewport height is below 490px, the Submit button of the Electron app becomes un-clickable. I believe this is due to the CMS.gov watermark overlay at the bottom of the screen creating an invisible overlay that has a higher z-index than the Submit button, so when they overlap, the Submit button is no longer clickable.

To Reproduce
Steps to reproduce the behavior:

1. Start the Electron app
2. Decrease the window height to below 490px
3. Try to click the Submit button. Instead of a pointer mouse cursor, it stays on the default cursor.

Expected behavior
The Submit button should be clickable (and should switch to the pointer cursor to indicate that it is clickable).

Actual behavior
The Submit button appears to be blocked by an invisible overlay and does not register any clicks.

Screenshots
If applicable, add screenshots to help explain your problem.

Device Info:

• OS: MacOS Sonoma 14.5
• Electron Version: 28.0

Additional context
Add any other context about the problem here.

[natalialuzuriaga]

Once fixed, be sure to also update "upload file and submit" frontend test