Need user-customization of "push to talk."

The push to talk works fine, however, it can be a real pain when using it on a Mac. I tend to use the Command key all the time (I'm a hotkey kind of user), and every time I use Cmd+Tab to another app away from the PTE window, it activates my mic. Not only that, it LEAVES IT ON while I work on my other apps. Then I inevitably come back to see people in the room saying "no sound" or "all I hear is clicking" (my typing).

Ideally, I could assign the key under the "File > Preferences" menu item, but I'd be thrilled with a checkbox that turned it on or off.