Field help text does not wrap but causes paragraph editor to expand to width of text

[yorkshire-pudding]

Steps to reproduce:

1. Add a paragraph type with a field and add very long help text. For example, I discovered this bug on Viewfield module (see text below), but reproduced on a plain short text field.
2. Edit a node with paragraphs on. The effect can be seen well if there are several other fields, especially ones with text editor
3. Add a paragraph of the type with long help text

Text of ViewField:

A comma separated list of arguments to pass to the selected view. Enable the Token module to see a complete list of tokens that may be used as arguments. (Wrap arguments containing commas in double quotes and replace double quotes in arguments with a pair of double quotes.)

Expected result:
Text wraps and does not widen the paragraph editor dialog

Actual result:
Text does not wrap but widens the paragraph editor dialog for all

Note - this does not happen for the same help text on a field on the node create form.

[yorkshire-pudding]

@laryn - I've added a PR that fixes this but I don't know if this is the best fix or if there is something wider happening with the divs in the embedded editor that is different from the node edit form.

[laryn]

Thanks for your help tracking this down and verifying the wider issue, @yorkshire-pudding!

Closing this issue in favor of core issue: backdrop/backdrop-issues#6365