Style outer frame of all channel manager dialogs

• Except for the pickers (which are fully rendered by Wicket)
• This includes all dialogs that are contributed by Targeting (alter ego editor et. al.)
• This should also provide an updated outer frame for all Angular powered dialogs

Use the visual "Popovers/Popovers_Bannercarousel" to get font sizes, etc. This story is done when the following items are styled:

• Dialog border
• Dialog header and close (X) button