Give Dashboard query panels a more obvious "View All" button

Summary:
Depends on D20333. Ref T13272. Currently, dashboard query panels have an aesthetic but hard-to-see icon to view results, with no text label.

Instead, provide an easier-to-see button with a text label.

Test Plan:

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13272

Differential Revision: https://secure.phabricator.com/D20334