why do i get the option to logoff/sign out (whatever) from gmail on my laptop, but not on my s6, or any other android device? i don't like having open programs just 'floating around.' it seems the only solutions i see are removing the account from your device. but then aren't i also losing everything associated with that address on my device? if that is the only way to accomplish a true logoff, would i then have to re-set up gmail each and every time i wanted to use it? i must be over-thinking this, right?