Those folks over at Mountain View aren't just obsessing over phones and televisions, it's also added a few more treats for those of us who use the offline email mode in Chrome. Now you can choose if you want to save 7, 14 or 31 days of backdated missives for those ten-hour flights spent with some guy's elbow stuck in your ribcage. You'll also find that your attachments will be available for use sans-internet and that keyboard shortcuts now work with the app -- as well as several minor performance updates and bug fixes. The revamped gear will trickle down your tube ready for the next time you open the app, just in time for that return flight from Las Vegas that no-one in particular is dreading.