IList was replaced by BindingList for property binding
and refresh data in the Grid (Welds and Coats)
Merge branch 'master' into sidorov_SaveCoatsAndWelds
Added checking with explicit conversion into BindingList
Merge branch 'master' into sidorov_SaveCoatsAndWelds

Conflicts:
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditXtraForm.cs
resolving conflicts after master merge:
duplicates of strings
Merge branch 'master' into sidorov_SaveCoatsAndWelds

Conflicts:
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditViewModel.cs
Merge pull request #433 from olga-jane/sidorov_SaveCoatsAndWelds

save Coats and Welds & data refresh