Popup auto closing in Create backfill

[aritra24]

The backfill button not being a child
has the menu button's click propagate
down leading to the modal auto closing.

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[aritra24]

I'm not entirely sure if this is the right approach to fixing this, so would definitely welcome some comments. Took quite a while to find the cause and my guess is it's because when the menu button's child item is clicked it triggers an auto close which is propagated down to it's children? Which in turn causes the modal's onClose to be called? Atleast that's my educated guess.

[enchant3dmango]

@aritra24 since it's a UI change, I think it's better if you can provide the screenshot of the before and after changes applied.

[aritra24]

Unfortunately not much of a screenshot to provide here, since the bug was the dialog box was flashing before now it doesn't.

[jscheffl]

Thanks for the fix - I was also noticing it is broken when I implemented #47250

Not being an expert in UI stuff, I assume this really fixes it.