Created Unassigned: Enable NuGet Package Restore not available when solution is hidden [3469]

Visual Studio allows you to hide the solution node if you only have a single project in your solution. When you have that scenario, the "Enable NuGet Package Restore" context-menu cannot be found.

Here's the report of this issue:
https://twitter.com/craigajohnson/status/353277797495603202

__Repro steps:__

1. Open VS
1. Create a new Project (select any project type; Windows / Console Application for example)
1. Open Tools / Options / Projects and Solutions
1. Turn off the checkbox for "Always show solution" and click OK

__Expected:__

Enable NuGet Package Restore should be available on the single project node

__Actual:__

Enable NuGet Package Restore is not available anywhere