Me thinks it wasn't accidental but a moment of political expediency. Otherwise her staff should and would have caught the oversight. That's what they get paid to do, cover all bases and have ready answers in the case of failure. Any bets she won't apologize but issue some generic comment about being all-inclusive?
The only good thing about the way too long primaries is that ever so slowly the truth begins to leak out about the candidates. Their real views and agenda. When she's asked about this oversight, check her shoes. Are they dancin' ones (generic answer) or professional ones (real view)? Either way, check the soles, we're the dust on 'em from the floor where we were swept.