* Remove unneeded package sources
Remove many packages sources that are no longer needed.
We think this may be increasing restore time and thus parallel builds of test projects are timing out while accessing the feeds.
* Update dependencies from https://github.com/dotnet/core-setup build 20190913.05
- Microsoft.NETCore.App - 3.0.0-rc2-19463-05
- NETStandard.Library.Ref - 2.1.0
- Microsoft.WindowsDesktop.App - 3.0.0-rc2-19463-05
Dependency coherency updates
- Microsoft.Dotnet.WinForms.ProjectTemplates - 4.8.0-rc2.19462.10 (parent: Microsoft.WindowsDesktop.App)
- Microsoft.DotNet.Wpf.ProjectTemplates - 3.0.0 (parent: Microsoft.WindowsDesktop.App)
* Add a dependency on Microsoft.NETCore.Platforms
This is not directly depended upon, but causes Maestro to flow stable feed locations.
* Use runtime package version
* Fix installer download locations
* Update windows desktop installer location
* Explicit reference the host model
* Make ref package version explicit
* Update property used to identify host version
* Update apphost versions
* Updated property versions to be used for branding, crossgen and bundled versions generation.