Page & Screen Details Pane

[mjashanks]

Pages and screens both have "meta" information, which apply to the screen and page itself... i.e. not belonging to their child components.

@pngwn describes this nicely here: #82 (comment)

Currently, there is nowhere in the builder to put these values.

Take the following example, where the Page is selected

The panel on the right contains tabs "Components" (for adding child components) and "Properties" which is the standard component properties tab (set layout & positioning etc of the Root <div> of the page)

We need somewhere in this panel to put the Page properties.... but only when "PAGE" is selected

I.e. when a child component is selected, this should probably disappear as it is not relevant (or is it? )

The same applies to screens