Multiple comment submissions for a diff is prevented now.

Summary:
It was possible to submit a comment multiple times if the submit
button was pressed more than once quickly. Added javascript code
that disables the button when it is clicked.

Test Plan:
Tried to click the button multiple times very quickly, but the
button was disabled after the first click.

Reviewed By: epriestley
Reviewers: epriestley, jungejason
Commenters: aran
CC: aran, epriestley, tuomaspelkonen
Differential Revision: 337

src/__celerity_resource_map__.php

@@ -284,6 +284,18 @@ celerity_register_resource_map(array(
     ),
     'disk' => '/rsrc/js/application/core/behavior-tokenizer.js',
   ),
+  'javelin-behavior-aphront-form-disable-on-submit' =>
+  array(
+    'uri' => '/res/6c659ede/rsrc/js/application/core/behavior-form.js',
+    'type' => 'js',
+    'requires' =>
+    array(
+      0 => 'javelin-behavior',
+      1 => 'javelin-stratcom',
+      2 => 'javelin-dom',
+    ),
+    'disk' => '/rsrc/js/application/core/behavior-form.js',
+  ),
   'javelin-behavior-dark-console' =>
   array(
     'uri' => '/res/044c171f/rsrc/js/application/core/behavior-dark-console.js',

src/view/form/base/AphrontFormView.php

@@ -64,6 +64,11 @@ final class AphrontFormView extends AphrontView {
 
   public function render() {
     require_celerity_resource('aphront-form-view-css');
+
+    Javelin::initBehavior(
+      'aphront-form-disable-on-submit',
+      array());
+
     return javelin_render_tag(
       'form',
       array(

src/view/form/base/__init__.php

@@ -7,6 +7,7 @@
 
 
 phutil_require_module('phabricator', 'infrastructure/celerity/api');
+phutil_require_module('phabricator', 'infrastructure/javelin/api');
 phutil_require_module('phabricator', 'infrastructure/javelin/markup');
 phutil_require_module('phabricator', 'view/base');