Use ',' (comma) as cost type separator

app/assets/stylesheets/costs/_summarized_cost_entries.css.sass

@@ -0,0 +1,23 @@
+/*-- copyright
+ * OpenProject Costs Plugin
+ *
+ * Copyright (C) 2009 - 2014 the OpenProject Foundation (OPF)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+.costs.costTypes
+  .separator
+    margin-left: -0.2em

app/assets/stylesheets/costs/costs.css.sass

@@ -19,3 +19,4 @@
  */
 
 @import costs/costs_legacy
+@import costs/summarized_cost_entries

app/assets/templates/work_packages/summarized_cost_entries.html

@@ -7,6 +7,6 @@
         <span ng-switch-default>{{ costType.props.unitPlural }}</span>
       </span>
     </a>
-    <span ng-if="!$last">-</span>
+    <span class="separator" ng-if="!$last">,</span>
   </span>
 </span>