Need to know if metamask has unsigned txs

We have reports of people losing funds.
Here is how:
1. Go to any Dapp and trigger an transaction signature, but don't sign it
2. Go to any other Dapp or the same Dapp and trigger action to sign a tx
Problem:
It makes users feel like they are signing 2nd transaction, while it's actually opposite, they sign oldest first, then second.
It leads to unexpected behavior and some people simply reject 2nd transaction thinking, ohhh it's some kind of old crap.

Solution:
Let developers of any Dapp an API to query if metamask has any unsigned txs, so we can at least prevent triggering new txs by letting users know that they have some unsigned crap and they need to take care of it first .
The current behavior is unacceptable.

@kumavis @danfinlay