Commit 9706941a

Add feature to select multiple wall tiles by pressing shift.
The tiles get added in the following order:
1. Follow 90° angles on both ends of a wall tile (as in corners inside a room)
2. For each side, if nothing was found, try to follow wall adjacent wall tiles on the same plane
3. For each side, if nothing was found, try to follow 270° angles (as in corners outside a house) 

Resolves #39


Hello! As mentioned in the last post, now it’s also possible to quickly change the wall types for entire rooms or the exterior of an entire building easily by holding shift while selecting.
It works very similar to the way the floor tile handling does, but was obviously a bit more tricky to implement. Nevertheless, check out the result below 🙂

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