form hide button now stays in the bottom right corner, regardless of the state of the form itself

An asterisk now marks when a field is required in order to submit, as a visible cue for those unfamiliar with image boards
A nicer, more compact post form, with placeholder text and colour cues to signal valid/invalid input and stuff.
Create thread/post button now follows the left edge of the submission form, when the form is resized
minor theme tweak; the post thread/reply button, while disabled, is now still legible, but in red text. That will be more approachable for new users, and is a better UI solution in general.
form submission button position was invalid because it was outside the form; chrome rendered it correctly, but firefox did not, this change means the site will render correctly in both