224: Workspace: reinforce the set of icons for recognised items

Task-Url: https://support.d4science.org/issues/224

Updated icon java

git-svn-id: http://svn.d4science-ii.research-infrastructures.eu/gcube/trunk/portlets/user/workspace-tree-widget@117231 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/user/workspace/client/resources/Icons.java

@@ -401,7 +401,7 @@ public interface Icons extends ClientBundle {
 	@Source("icons/archive-icon.png")
 	ImageResource archive();
 	
-	@Source("icons/java.gif")
+	@Source("icons/java.png")
 	ImageResource java();
 }