Furniture changes and fixes

In answer to Issue #4357 

Exercise machines, sofas, armchairs, dumpsters, trashcans, dryers, and washers are now smash-able.

indoor plants are flammable.

open crates can be deconstructed as well.

tables now require 8 strength to be moved around.

Fix missing additional "O" in bookcase flag: "BLOCKSDOOR".