Peeking/tearing curtains from the outside + additional problem

[MisterFelixFox]

I very much like the new tearing/peeking feature, but there are some bugs!

1. You can peek through/tear down the curtain from outside the building.
2. If a window was able to be opened before tearing down the curtains, you can no longer open it.

[KA101]

2 was already addressed: that's a function of the current construction code, so not a Bug per se. PR an openable yet non-curtained window and we'll merge it, but it wasn't worth holding up the tear-down ability.

1 is a real issue, yeah. Thanks for reporting.