Show Manage NuGet Packages as an option on

• Dependencies node's context menu for SDK style projects Add Manage NuGet packages to context menu for NuGet node #5049 (Released in 16.4 Preview 2)
• Packages node's context menu for SDK style projects Add Manage NuGet packages to context menu for NuGet node #5049 (Released in 16.4 Preview 2)
• References node's context menu for csproj.dll based projects

(Note: 'NuGet' node was renamed to 'Packages' in 16.3)

From Developer community suggestion: https://developercommunity.visualstudio.com/content/idea/622379/add-manage-nuget-packages-to-context-menu.html
GitHub Issue: #5049