When query panels have more results, show a "View All Results" button at the bottom

Summary:
Depends on D20335. Ref T13263. Ref T13272. See PHI854. Ref T9903.

Currently, we don't provide a clear indicator that a query panel is showing a partial result set (UI looks the same whether there are more results or not).

We also don't provide any way to get to the full result set (regardless of whether it is the same as the visible set or not) on tab panels, since they don't inherit the header buttons.

To (mostly) fix these problems, add a "View All Results" button at the bottom of the list if the panel shows only a subset of results.

Test Plan:

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13272, T13263, T9903

Differential Revision: https://secure.phabricator.com/D20336