Add an "Open in External Editor" keystroke to Differential

Summary: Ref T13515. See PHI1661. If a file is selected, add a keystroke to click the "Open in External Editor" link.

Test Plan: In Safari, Chrome, and Firefox: used "J" to select a file, then "\" to open it in an external editor. (In Safari and Chrome, this prompts.)

Maniphest Tasks: T13515

Differential Revision: https://secure.phabricator.com/D21135

resources/celerity/map.php

@@ -12,7 +12,7 @@ return array(
     'core.pkg.css' => '86f155f9',
     'core.pkg.js' => '705aec2c',
     'differential.pkg.css' => '607c84be',
-    'differential.pkg.js' => '1b97518d',
+    'differential.pkg.js' => 'd73a942b',
     'diffusion.pkg.css' => '42c75c37',
     'diffusion.pkg.js' => 'a98c0bf7',
     'maniphest.pkg.css' => '35995d6d',
@@ -377,8 +377,8 @@ return array(
     'rsrc/js/application/dashboard/behavior-dashboard-move-panels.js' => 'a2ab19be',
     'rsrc/js/application/dashboard/behavior-dashboard-query-panel-select.js' => '1e413dc9',
     'rsrc/js/application/dashboard/behavior-dashboard-tab-panel.js' => '0116d3e8',
-    'rsrc/js/application/diff/DiffChangeset.js' => 'a31ffc00',
-    'rsrc/js/application/diff/DiffChangesetList.js' => '0f5c016d',
+    'rsrc/js/application/diff/DiffChangeset.js' => '7ccc4153',
+    'rsrc/js/application/diff/DiffChangesetList.js' => '2e636e0a',
     'rsrc/js/application/diff/DiffInline.js' => 'a4a14a94',
     'rsrc/js/application/diff/behavior-preview-link.js' => 'f51e9c17',
     'rsrc/js/application/differential/behavior-diff-radios.js' => '925fe8cd',
@@ -774,8 +774,8 @@ return array(
     'phabricator-darklog' => '3b869402',
     'phabricator-darkmessage' => '26cd4b73',
     'phabricator-dashboard-css' => '5a205b9d',
-    'phabricator-diff-changeset' => 'a31ffc00',
-    'phabricator-diff-changeset-list' => '0f5c016d',
+    'phabricator-diff-changeset' => '7ccc4153',
+    'phabricator-diff-changeset-list' => '2e636e0a',
     'phabricator-diff-inline' => 'a4a14a94',
     'phabricator-drag-and-drop-file-upload' => '4370900d',
     'phabricator-draggable-list' => '0169e425',
@@ -1015,10 +1015,6 @@ return array(
       'javelin-workflow',
       'phuix-icon-view',
     ),
-    '0f5c016d' => array(
-      'javelin-install',
-      'phuix-button-view',
-    ),
     '111bfd2d' => array(
       'javelin-install',
     ),
@@ -1173,6 +1169,10 @@ return array(
       'javelin-util',
       'javelin-stratcom',
     ),
+    '2e636e0a' => array(
+      'javelin-install',
+      'phuix-button-view',
+    ),
     '2f1db1ed' => array(
       'javelin-util',
     ),
@@ -1612,6 +1612,17 @@ return array(
       'javelin-install',
       'javelin-dom',
     ),
+    '7ccc4153' => array(
+      'javelin-dom',
+      'javelin-util',
+      'javelin-stratcom',
+      'javelin-install',
+      'javelin-workflow',
+      'javelin-router',
+      'javelin-behavior-device',
+      'javelin-vector',
+      'phabricator-diff-inline',
+    ),
     '80bff3af' => array(
       'javelin-install',
       'javelin-typeahead-source',
@@ -1805,17 +1816,6 @@ return array(
       'javelin-workflow',
       'phabricator-draggable-list',
     ),
-    'a31ffc00' => array(
-      'javelin-dom',
-      'javelin-util',
-      'javelin-stratcom',
-      'javelin-install',
-      'javelin-workflow',
-      'javelin-router',
-      'javelin-behavior-device',
-      'javelin-vector',
-      'phabricator-diff-inline',
-    ),
     'a4356cde' => array(
       'javelin-install',
       'javelin-dom',