Fix image lightbox width and post pagination issues

[steven-fox]

This PR fixes:

• Modal width for tall content.
• Lightbox images becoming taller than the viewport.
• Missing click handlers for questions that are fetched via infinite scrolling, as they were added to the DOM after the initial Alpine component init() function ran, so the new ones from the server never added event handlers.

Closes #446

This PR replaces #489. Had something weird happen with the branch/commits when I rebased against main. Check out that PR for more info on this implementation if needed.

Before

After

pinkary.lightbox.fix.mp4