Move PHUIErrorView to PHUIInfoView

Summary: Since this element isn't strictly about errors, re-label as info view instead.

Test Plan: Grepped for all callsites, tested UIExamples and a few other random pages.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: hach-que, Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11867

src/applications/diffusion/controller/DiffusionExternalController.php

@@ -69,9 +69,9 @@ final class DiffusionExternalController extends DiffusionController {
       }
       $desc .= $id;
 
-      $content = id(new PHUIErrorView())
+      $content = id(new PHUIInfoView())
         ->setTitle(pht('Unknown External'))
-        ->setSeverity(PHUIErrorView::SEVERITY_WARNING)
+        ->setSeverity(PHUIInfoView::SEVERITY_WARNING)
         ->appendChild(phutil_tag(
           'p',
           array(),