Applying for I-485 automatically doesnt change your status but using EAD does. Just like you can still be on H1 even after applying I-1485 she can still be on H4 too unless her H4 status has expired and you have not applied for the renewal. If that is the case she needs the approved AP to travel and cannot have her H4 re-stamped.

This is as far as my knowledge goes but you may want to verify with an immigration attorney.