[PUBBY] Some windows aren't using window spawners

[SabreML]

Round ID:

Round ID: 85

Testmerges:

#748 is the only relevant one.

Details:

The Chapel's 'Monastery Garden' area and a few of the nearby walkways are using mapped-in windows rather than window spawners.
This wouldn't usually be very noticable, but with the Horizon walls PR it means that none of them are spawning with 'low walls' under them.