[OPEN] Unable to knock the door if front door isn't on first floor

@crinrict I can't speak to the behavior pre-patch because this runs into more of a live mode issue, and I don't really play my families such that they go out visiting others (they stay at home to test my builds, and that's it :P).  However, I can confirm that currently, doors placed on upper levels or on the basement level cannot be "set to front door" and cannot be knocked on.