bunch of updates

bunch of updates

For blogs, move to left justified, make code sections expand over the
whole screen so they aren't cut off. And on mobile, make them scrollable
because otherwise they overflow the body and i dunno how to fix that.

Fix email error 500 error on comment submission, hidden form not being
hidden. Change main content background to be darker so code sections
stand out more so you notice you can scroll them.

Change comment box to be more standard white with no text in it so its
easier to use.