use ctrl-shift-n to open new session window

[gordol]

open new session window when pressing ctrl-shift-n

[gordol]

went ahead and pushed up a change to do proper key binding.... also just removed that escape hack too, it's not necessary on latest chrome os/hterm as far as i can tell... no issues with escape leaving fullscreen.

maybe that's a windows/mac thing? not sure... i only use this on chrome os.

[vapier]

i'm not familiar with this Esc code, but the keyboard shortcut register part looks fine now. thanks!