Issue 2366 - fix out of memory error on some mesh selection (#2368)
Issue 2366 - fix out of memory error on some mesh selection (#2368)

* ISSUE #2366 use set to ensure unique

* ISSUE #2366 clone the array
3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io