Fix resize loop issue

[OliverJAsh]

Closes #7017

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Open the story and verify #7017 no longer reproduces.

🧢 Your Project:

Unsplash

[OliverJAsh]

This story is more of a test, to reproduce the issue before the fix and to verify it works correctly after the fix. Is there a better place to do that? If not, what should I name it? I wanted to write a unit test, but I'm not sure how to write it.

[snowystinger]

it's fine to have a storybook example for something like this, it's really hard to reproduce in a unit test

one option could be to use storybook's "play" feature and see if you can use that to automate what should happen

[snowystinger]

There are some examples around the code base of how to add a description to the story so we know how to test it in the future. You may need to adjust the code sample I wrote below.

Suggested change

	export const PopoverRightExample = () => (
	<MenuTrigger>
	<Button style={{marginLeft: 'auto'}}>Open popover</Button>
	<Popover placement="bottom end">
	<PopoverRightExampleContent />
	</Popover>
	</MenuTrigger>
	);
	export const PopoverRightExample = {
	render: () => (
	<MenuTrigger>
	<Button style={{marginLeft: 'auto'}}>Open popover</Button>
	<Popover placement="bottom end">
	<PopoverRightExampleContent />
	</Popover>
	</MenuTrigger>
	),
	parameters: {description: 'how to test this story, what does it do?'},
	name: 'more descriptive name?'
	};

[snowystinger]

I tried out the story, I'm unable to reproduce the warning either with or without the fix. The one thing I do notice is that the popover used to resize several time as the text reflowed, now it appears to snap to the correct width immediately, so that seems to be an improvement. We'll need to run chromatic for this as well to make sure it didn't inadvertently change anything. And we'll need to test a bunch of other popovers.

I have a vague recollection that we tried this fix a while ago and something unexpected happened. If I have time, I'll try to see if I can dig anything up. Might've been something with submenu's or tooltips blocking background content.