Add 'icon' and 'icon-add' classes to new enum links (#24776).

Patch by Mischa The Evil.

git-svn-id: http://svn.redmine.org/redmine/trunk@16187 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/enumerations/index.html.erb

 
 <% enumerations = klass.shared %>
 
-<p><%= link_to l(:label_enumeration_new), new_enumeration_path(:type => klass.name) %></p>
+<p><%= link_to l(:label_enumeration_new), new_enumeration_path(:type => klass.name), :class => 'icon icon-add' %></p>
 
 <% if enumerations.any? %>
 <table class="list enumerations"><thead>