posts: fix Download link not respecting tagged filenames option.

Fix bug reported in forum #182766:

    The Download button on the posts page does not respect the Disable
    tagged filenames user setting. Tags are included in the filename when
    clicking the Download button even when the Disable tagged filenames
    setting is set to Yes. Right click -> Save As on the image still
    respects the setting.

app/presenters/post_presenter.rb

@@ -14,7 +14,11 @@ class PostPresenter
     @humanized_essential_tag_string ||= tag_set_presenter.humanized_essential_tag_string.presence || "##{@post.id}"
   end
 
-  def filename_for_download
-    "#{humanized_essential_tag_string} - #{@post.md5}.#{@post.file_ext}"
+  def filename_for_download(current_user)
+    if current_user.disable_tagged_filenames?
+      "#{@post.md5}.#{@post.file_ext}"
+    else
+      "#{humanized_essential_tag_string} - #{@post.md5}.#{@post.file_ext}"
+    end
   end
 end

app/views/posts/partials/show/_options.html.erb

@@ -17,7 +17,7 @@
   </li>
   <% if policy(post).visible? %>
     <li id="post-option-download">
-      <%= link_to "Download", post.tagged_file_url + "?download=1", download: post.presenter.filename_for_download %>
+      <%= link_to "Download", post.tagged_file_url + "?download=1", download: post.presenter.filename_for_download(CurrentUser.user) %>
     </li>
   <% end %>