studio - changed the label of view published/live version of unit presented to a user while editing a draft of the same unit

template is empty (very awkward b/c it's a template descriptor not an
instance one)
Changed display conditionals to get the right things to show in the
right tabs for problems

styled header of problem component adding menu and made it only visible when you are in the problem menu

studio html editor - revised header styles for editing/displaying HTML components (including separating studio editing chrome from style rules)

differentiate them in the drop down (just added MD to names for
now--brian's doing the official differentiation)