Index: public/stylesheets/application.css
===================================================================
--- public/stylesheets/application.css	(Revision 17620)
+++ public/stylesheets/application.css	(Arbeitskopie)
@@ -595,6 +595,10 @@
 
 #notified-projects>ul, #tracker_project_ids>ul, #custom_field_project_ids>ul {max-height:250px; overflow-y:auto;}
 
+ul.subprojects {list-style: none; display: inline-block; padding: 0; margin: 0;}
+ul.subprojects li {float: left;}
+ul.subprojects li:not(:last-child)::after {content: ', '; white-space: pre; white-space: pre;}
+
 #related-issues li img {vertical-align:middle;}
 
 ul.properties {padding:0; font-size: 0.9em; color: #777;}