Setting a default for linkTargetType in link.js

We use the link plugin to allow our users to add hyperlinks easily to their documents. We would like to default the Target Type select box to _blank, but I don't see a way to do it.

Looking at the code for link.js, it looks like the hardcoded value for 'default' is 'notSet.' I would like to be able to set this to targetNew or '_blank' either at configuration time or at run time.

Any suggestions, or is this maybe a feature request?

Thanks,
Dan