'Arrow' and 'Flash' Star Emily Bett Rickards -- Total Felicity Smoak Show (PHOTO)

Emily Bett Rickards swapped her hacker gear for a bikini while vacationing with friends in Maui -- and we're sure "Arrow" fans hope she never switches back. Of course, Emily plays computer expert Felicity Smoak on 2 CW hit shows -- "Arrow" and "The…