Prevent Duplicate Check Numbers ?

[jazzyjackson]

So I think since we're encrypted the memorized information we stopped auto-incrementing check number -- do we want to

A: increment on load

B: warn / error if check number is same as previous check

C: forget having a check number at all since it's just for customers' benefit and bank maybe doesn't care

[amark]

Ideally auto-increment, but how do we visualize this is new state not old state? :/

(on focus, show a .say that says something like "Last check number was XXX on ZZdateZZ" maybe? Or can we :hover:before a tooltip? So not intuitive at first, but after couple uses of Remember Me you learn to forget/not care.)