Table scroll buttons always appear/disappear on load

[j3parker]

Creating a new <d2l-table-wrapper>+<table> and inserting it into the page always causes the horizontal scroll buttons to quickly appear/disappear when the table is rendered.

That is visible on this page: https://census.d2l.dev/sql.html?v=2022/04/20/18 if you type SELECT 1 and hit "Execute". This page relies on creating tables dynamically with different columns depending on user input, so it is very noticable.

@svanherk noticed that https://daylight.d2l.dev/components/table/ actually exhibits the issue (but it of course is less noticable with it being on page load + there being more on that page.)

Not a big deal, just an FYI.