Incrementally call styleHandlers, and remove intermediate <div>

[texodus]

A few big-picture API cleanup changes in this PR, and a few bugs:

• Refactors perspective.md model to separate dataListener() and formatStyleListener() into separate functions.
• styleHandlers are now invoked incrementally when a column's widths are not known, with total width calculation being deferred until pagination. This clears up a whole category of resize bugs involving columns failing to render for just the first call to draw().
• The default DOM structure has been simplified (due to browser bug fixes since publication) to remove an intermediate <div> layer.

<regular-table>
    <div>
        <table></table>
    </div>
</regular-table>

vs.

<regular-table>
    <table></table>
</regular-table>

• Fixes overscroll behavior due to browser "bounce" on browser which bounce.
• Fixes test instability via jest-puppeteer-docker for docker based image recreation.