dashboard: remove boldness from renew and disk buttons

circle/dashboard/templates/dashboard/vm-detail/_disk-operations.html

@@ -3,7 +3,7 @@
 {% for op in ops %}
 {% if op.is_disk_operation %}
     <a href="{{op.get_url}}" class="btn btn-success btn-xs
-            operation operation-{{op.op}} btn btn-default">
+            operation operation-{{op.op}}">
       <i class="fa fa-{{op.icon}}"></i>
             {{op.name}} </a>
 {% endif %}

circle/dashboard/templates/dashboard/vm-detail/home.html

@@ -50,7 +50,7 @@
       <span id="vm-details-renew-op">
         {% with op=op.renew %}
           <a href="{{op.get_url}}" class="btn btn-success btn-xs
-                  operation operation-{{op.op}} btn btn-default">
+                  operation operation-{{op.op}}">
             <i class="fa fa-{{op.icon}}"></i>
                   {{op.name}} </a>
         {% endwith %}