Lectern's hitbox is too large

Summary:
Lecterns have too large of a hitbox. Their stand is not as wide as the top, so it should be possible to interact with things behind or next to it.

Steps to Reproduce:

1. Place down a lectern
2. Try to interact with something behind or next to the lectern's stand

Observed Results:
It is not possible to interact with anything behind or next to the lectern's stand due to the hitbox being the same size as the top.

Expected Results:
It should be possible to interact with anything behind or next to the lectern's stand.