This is a requested change rather than a new idea. Move it to "Kvetch!" if you want. But, shouldn't the ONLY choice in the Insert/Edit link menu be "Open link in new window" rather than including "Open link in same window" since "same window" is the default anyway? It's just that when I'm in "Visual" mode versus "HTML" mode, and I click on that box to make the link open in a new window, in my haste I sometimes click the wrong choice.
Not a big deal, obviously, just aggravating sometimes.