I think the add-on Zenbu will open the live-look previews in a lightbox style modal if you wanted to use that. It's pretty good and gives you the ability to create custom views for entry lists.
You could look for the word "View" in a link or count which column the link is in and target that. Neither way is going to be bulletproof but it might work for your circumstances.
UPDATE: Just made an accessory for you. Download accessory to open Live Look links in a new window Unzip it into your expressionengine/third_party folder and install it from Add-ons->Accessories. This just looks for links with the word "View" so it's far from robust but it should do the job in a basic way.