- Remove margins and add a border to the pseudo-element.
It improves how the text of the pseudo-component matches the text from
textarea and should prevent the scrollbar from appearing due to mismatch.
- Swap explicit width setting for editable-text in itemBox for
min-width: 0. It still allows the editable-text to be shrunk when the
itemBox is narrow but does not cause mismatches between pseudo elements
and the textarea.
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