Implement basic transaction detail blocks

Summary:
Some transactions (like editing configuration values, task descriptions, or Conpherence images) can't be simply explained and need an additional larger element to show them fully (like a text diff).

Support change details like this in ApplicationTransactions. Implements the element in Config, so you can see changes.

Test Plan: {F32974}

Reviewers: chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2213

Differential Revision: https://secure.phabricator.com/D4984

src/applications/directory/controller/PhabricatorDirectoryController.php

@@ -84,7 +84,7 @@ abstract class PhabricatorDirectoryController extends PhabricatorController {
         $show_item = id(new PhabricatorMenuItemView())
           ->setName(pht('Show More Applications'))
           ->setHref('#')
-          ->addSigil('home-show-applications')
+          ->addSigil('reveal-content')
           ->setID($show_item_id);
 
         $hide_item = id(new PhabricatorMenuItemView())
@@ -92,7 +92,7 @@ abstract class PhabricatorDirectoryController extends PhabricatorController {
           ->setHref('#')
           ->setStyle('display: none')
           ->setID($hide_item_id)
-          ->addSigil('home-hide-applications');
+          ->addSigil('reveal-content');
 
         $nav->addMenuItem($show_item);
         $tile_ids = array($hide_item_id);
@@ -146,10 +146,18 @@ abstract class PhabricatorDirectoryController extends PhabricatorController {
       }
 
       if ($is_hide) {
-        Javelin::initBehavior('phabricator-home-reveal-tiles', array(
-          'tileIDs' => $tile_ids,
-          'showID' => $show_item_id,
-        ));
+        Javelin::initBehavior('phabricator-reveal-content');
+
+        $show_item->setMetadata(
+          array(
+            'showIDs' => $tile_ids,
+            'hideIDs' => array($show_item_id),
+          ));
+        $hide_item->setMetadata(
+          array(
+            'showIDs' => array($show_item_id),
+            'hideIDs' => $tile_ids,
+          ));
         $nav->addMenuItem($hide_item);
       }
     }