Blockout Tools Plugin

[Mugoo]

@Dmitry_Karpukhin

Happy to inform that “freeze on duplication” problem is now pretty much solved in 1.22 update. It still could be improved even more by moving almost all blockout generation code in C++, but that could take some time and I was kinda in a hurry to fix this right now to ensure that the workflow experience will become stable again.
Also added option to turn off shadows on blockouts individually by a request.
Thanks for reporting back, guys!

Excellent job! This update has completely eliminated the crashing on my side.

Thanks!