Allow DocumentView to render with a curtain, and make Phriction use a curtain
I never really got used to these and think they're a net usability loss, and broadly agree with the feedback in T8172. I'd generally like to move back toward a state where actions are available on the page, not hidden in a menu.
For now, just put a curtain view on these pages. This could be refined later (e.g., stick this menu to the right hand side of the screen) depending on where other Phriction changes go.
(Broadly, I'm also not satisfied with where we ended up on the fixed-width pages like Diffusion > Manage, Config, and Instances. In contrast, I do like where we ended up with Phortune in terms of overall design. I anticipate revisiting some of this stuff eventually.)
- Looked at Phriction pages on desktop/tablet/mobile/printable -- actions are now available on the page.
- Looked at other DocumentView pages (like Phame blogs) -- no changes for now.
Differential Revision: https://secure.phabricator.com/D19617