Change inline edit comment confirm button caption to Ready

Summary:
Caption Submit is quite confusing because it doesn't actually make the data visible to other users.
Especially when comment confirm button is also called Submit in serious mode.

Test Plan: Add inline comment.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1796

src/applications/differential/view/inlinecommentedit/DifferentialInlineCommentEditView.php

@@ -97,7 +97,7 @@ final class DifferentialInlineCommentEditView extends AphrontView {
   private function renderBody() {
     $buttons = array();
 
-    $buttons[] = '<button>Submit</button>';
+    $buttons[] = '<button>Ready</button>';
     $buttons[] = javelin_render_tag(
       'button',
       array(