Added dropdown support. I'll put in an issue to make it look pretty.

https://jsfiddle.net/1n0azhz1/4/

Poster IDs still linebreak between "ID:" and the ID, this corrects that without having to replace the space inbetween with an   nonbreaking space.

Signed-off-by: 8n-tech <8n-tech@users.noreply.github.com>

Signed-off-by: 8n-tech <8n-tech@users.noreply.github.com>

Rewrote inline-expanding.js to display full image as soon as it starts
loading.
Modified expand-all-images.js to work with the new change
Moved max-width to style.css

Conflicts:
	stylesheets/style.css
	templates/post_form.html

For some reason, threads in the catalog were laid out by a jQuery plug-in. This is
now removed and the layout is created purely by handcrafted CSS code.