Be able to define whole page or partial page layouts separate from widgets, to define how widgets interact with each other on the page level - with own CSS files specific to page layouts.
Define new header UI elements to allow for browsing of layouts.
@micfunk can you make a mockup that would help OSS Army people understand what this feature should look like? Just attach it to this issue thread if you would.
Be able to define whole page or partial page layouts separate from widgets, to define how widgets interact with each other on the page level - with own CSS files specific to page layouts.
Define new header UI elements to allow for browsing of layouts.