Addition of "mass" vaiable in script menu

[Rideg]

The title basically describes it all. I've noticed that sometimes you want to access an object's mass when dealing with thyme. I.e when you want to calculate an objects thickness by using the object's y-length and the mass.

And for all perfectionists you can set a "exact" weigh value instead of the rounded one you see in the materials menu.

[mrmegawarrior]

support

[LLamaman]

Makes sense, and I definitely support your second suggestion, it would be much more convenient when balancing things.