Repro steps:
1. Install VS 2012 SKU such as VSU and VWD
2. Install nuget 2.7
3. check the package source
Expected: there is only one nuget.org source that's active/selected
Actual: there is only one nuget.org source, but it's unchecked. when starting PM dialog, no sources is available.
1. Install VS 2012 SKU such as VSU and VWD
2. Install nuget 2.7
3. check the package source
Expected: there is only one nuget.org source that's active/selected
Actual: there is only one nuget.org source, but it's unchecked. when starting PM dialog, no sources is available.
