Phew this took a while, but I think it's a good compromise. All the
scrolling for a preview view now must happen inside the individual
views, rather than at the root level. Now, the scrollbars render in the
right places and are always visible inside the block. I don't love the
blurred header for the table, but it was make it blurry or make it even
more opaque, which would ruin the transparency
This PR adds back WebGL acceleration (enabled by default) for XTerm. It
also adds back link handling and adds a new option (disabled by default)
to open all links internally as a new web block.
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Co-authored-by: sawka <mike.sawka@gmail.com>