Remove nonfunctional links from Differential inline comment previews

Summary:
They currently have "Next", "Previous" and "Reply" links which don't work. Don't
render these links.

Test Plan:
Looked at inline previews, didn't see any silly/nonfunctional links.

Reviewed By: tuomaspelkonen
Reviewers: aran, jungejason, tuomaspelkonen
CC: aran, epriestley, tuomaspelkonen
Differential Revision: 419

src/applications/differential/controller/inlinecommentpreview/DifferentialInlineCommentPreviewController.php

@@ -53,6 +53,7 @@ class DifferentialInlineCommentPreviewController
       $view->setMarkupEngine($engine);
       $view->setHandles($handles);
       $view->setEditable(false);
+      $view->setPreview(true);
       $views[] = $view->render();
     }
     $views = implode("\n", $views);

src/applications/differential/view/inlinecomment/DifferentialInlineCommentView.php

@@ -24,6 +24,7 @@ final class DifferentialInlineCommentView extends AphrontView {
   private $handles;
   private $markupEngine;
   private $editable;
+  private $preview;
 
   public function setInlineComment(DifferentialInlineComment $comment) {
     $this->inlineComment = $comment;
@@ -55,6 +56,10 @@ final class DifferentialInlineCommentView extends AphrontView {
     return $this;
   }
 
+  public function setPreview($preview) {
+    $this->preview = $preview;
+  }
+
   public function render() {
 
     $inline = $this->inlineComment;
@@ -83,6 +88,7 @@ final class DifferentialInlineCommentView extends AphrontView {
 
     $links = array();
 
+    if (!$this->preview) {
       $links[] = javelin_render_tag(
         'a',
         array(
@@ -109,8 +115,9 @@ final class DifferentialInlineCommentView extends AphrontView {
           'sigil'       => 'differential-inline-reply',
         ),
         'Reply');
+    }
 
-    if ($this->editable) {
+    if ($this->editable && !$this->preview) {
       $links[] = javelin_render_tag(
         'a',
         array(