Add the ability to lock filled schematics from the material gun

[true tendon]

I don't know if I have a skill issue of some sorts or if some of you guys had the same problem where for example you are consuming materials from schematics or they're just lying on the floor and suddenly there's a lag spike or you miss by one pixel and the material gun straight up just consumes the floor that you built beneath yourself and everything falls through it down to the basement or wherever.
Idk would be cool to have that ability

[iron trail]

need this rn

[true tendon]

B

[true tendon]

B

[fallen beacon]

NEED this, custom floors look nice but I have to use vehicle spawners to make a safe platform where I can scoop up processed materials