Link welds to pipe
Merge branch 'master' into welder_pipe

Conflicts:
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditViewModel.cs
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditXtraForm.Designer.cs
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditXtraForm.cs
Merge pull request #238 from olga-jane/O_Morozova

O Morozova update UI
child creation (without closing)
close event handled
Merge pull request #241 from olga-jane/oobi_cf2

Implement common number of opened documents
Merge branch 'master' into welder_pipe

Conflicts:
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditXtraForm.Designer.cs
	src/PrizmMainProject/Forms/PipeMill/NewEdit/MillPipeNewEditXtraForm.cs
Merge pull request #239 from olga-jane/welder_pipe

Link welders to pipe
Merge pull request #243 from olga-jane/master

Update O_Morozova