Fixed: Syntax highlighting unavailable from board new topic or topic edit preview (#7625).

Contributed by Etienne Massip.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4889 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/messages/edit.rhtml

@@ -12,3 +12,7 @@
                      }, :accesskey => accesskey(:preview) %>
 <% end %>
 <div id="preview" class="wiki"></div>
+
+<% content_for :header_tags do %>
+    <%= stylesheet_link_tag 'scm' %>
+<% end %>