Clean up misc Ponder details

Summary: Ref T3578, Changes "Ask Away" to just "Submit", Changes Description to Details, check for is_new when offering closed state on question edit.

Test Plan: New Question, Edit Question

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T3578

Differential Revision: https://secure.phabricator.com/D13891

src/applications/ponder/controller/PonderQuestionViewController.php

@@ -171,7 +171,10 @@ final class PonderQuestionViewController extends PonderController {
 
     $view->invokeWillRenderEvent();
 
-    $view->addSectionHeader(pht('Question'));
+    $view->addSectionHeader(
+        pht('Details'),
+        PHUIPropertyListView::ICON_SUMMARY);
+
     $view->addTextContent(
       array(
         phutil_tag(