Is your feature request related to a problem? Please describe.
Make the sleeping bag usable alone. I would carry a sleeping bag separate from the backpack.

Describe the solution you'd like
Allow the sleeping bag to be placed and picked up like a bed.

Describe alternatives you've considered
use comforts mod :)

Additional context
Add any other context or screenshots about the feature request here.

It would be nice to be able to set a hot key to place sleeping bag.

1. target block
2. place backpack with sleeping bag out

rather than

1. open backpack
2. remove backpack
3. place backpack
4. roll out sleeping back

d'oh duplicate of #403