Repro steps:
1. on a existing machine with older version of nuget installed
2. double click to install latest nuget 2.7 VSIX as in a upgrade fashion
3. check the package source
Expected: The nuget official feed source is replaced by nuget.org feed
Actual: Still there. nuget.org was added as another feed.
1. on a existing machine with older version of nuget installed
2. double click to install latest nuget 2.7 VSIX as in a upgrade fashion
3. check the package source
Expected: The nuget official feed source is replaced by nuget.org feed
Actual: Still there. nuget.org was added as another feed.