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: {F6314091}

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13272

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

src/applications/dashboard/paneltype/PhabricatorDashboardQueryPanelType.php

@@ -120,10 +120,18 @@ final class PhabricatorDashboardQueryPanelType
     $search_engine = $this->getSearchEngine($panel);
     $key = $panel->getProperty('key');
     $href = $search_engine->getQueryResultsPageURI($key);
+
     $icon = id(new PHUIIconView())
-        ->setIcon('fa-search')
-        ->setHref($href);
-    $header->addActionItem($icon);
+      ->setIcon('fa-search');
+
+    $button = id(new PHUIButtonView())
+      ->setTag('a')
+      ->setText(pht('View All'))
+      ->setIcon($icon)
+      ->setHref($href)
+      ->setColor(PHUIButtonView::GREY);
+
+    $header->addActionLink($button);
 
     return $header;
   }