Virtual entities added by Polymer cannot be inspected

[haykam821]

The client-only entities added by Polymer cannot be inspected, both due to a lack of hitbox and lack of server NBT.

[BasiqueEvangelist]

The inspector used to first try to ask the server if the entity exists, and only if it is allows you to change to the client repr in the screen, but I reverted this in a recent commit. The lack of hitbox shouldn't really matter, as gadget uses a raycast method that ignores whether the entity is collidable (which is why item entities work). I'll try to test inspecting virtual entities soon™ to see if it works now