[FIXED] P_Extrude_Shell and Shell thickness discrepancy

The thickness in "P_Extrude_Shell" doesn't equal thickness from "Shell" tool. Actually thickness value passed as an argument to "P_Extrude_Shell" is divided by the value from unit setup.
So, for example, if unit setup is "100 as one metre" and user passes "1;1" arguments to "P_Extrude_Shell" function, it will create a shell with a thickness of 1/100=0.01 instead of 1. "Shell" on the other hand works as expected.
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It's fixed. Thanks.