Revert after trouble with rewrited files.
New files for columns manager
Merge branch 'master' of https://github.com/mvsinc/VNetDev

Conflicts:
	VNet/Classes/GridColumnsManager.cs
	VNet/Classes/GridTabsManager.cs
	VNet/View/GridColumnsManagerView.xaml
	VNet/ViewModel/BranchesViewModel.cs
	VNet/ViewModel/GridColumnsManagerViewModel.cs