Sandboxlib

- Fix app scrolling on iOS.
- Fix popups being onclosable on iOS.
- Fix app selection on mobile.

- Fix grain title misalignment on Firefox.

- Revamped design of menus hanging off top bar. Now much less ugly! Plus the login menu is consistent with everything else!
- Major internal refactoring of topbar UI. Please be on the lookout for bugs.
- Mobile UI hamburger menu contents are now more complete and contextually correct (due to topbar UI refactoring).
- Fixed loading spinner in case where grain fails to start.
- Fixed bugs where transitive shares wouldn't grant access.
- Finally added "new" code devs to "about" page.

- Loading spinner is back, hopefully non-buggy this time.
- Fixed regression in web publishing that caused sites to be cached for 30000 seconds instead of the intended 30 seconds.
- Refactored sharing permissions computation.
- Introduced admin UI for creating raw IP networking capabilities, which can be passed into apps.
- Offer templates can now specify that the offered token is meant to be used by users other than the creating user, like sharing tokens.

- Reverted "loading" spinner because it interacted badly with the "reveal your identity?" interstitial.

- Oasis: Storage usage and quota is now tracked and enforced.
- We now display a spinner when apps are slow to start up. (But we are working on making apps start faster!)
- Offer templates now work for anonymous users, and the tokens do not expire as long as the template is still displayed.
- Long admin alerts should now avoid covering the top bar controls.
- When copy/pasting a token for email login, whitespace is now ignored.
- When restoring a backup fails, we now delete the just-unpacked data rather than leak the story.
- Fixes and improvements to sharing implementation details.