Velocity macro evaluation exception caused by a NPE on the homepage of a workspace if it has no pretty name

This is not really observable in most cases, but it should be fixed, just in case you end up with a workspace (or template) that does not have the pretty name set.

Basically, a call to $msg.get($key, $nullValuedVariable) throws a NPE.

Maybe the $msg.get call should be a bit more permissive, but that`s another topic.