Fix adding project references order

[vasily-kirichenko]

This partially fixes #3033

[vasily-kirichenko]

OK, it raises the following assertions while loading VFT solution, closing it.

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Assertion Failed: Abort=Quit, Retry=Debug, Ignore=Continue

Could not retrive referenced project guidproject file

at Microsoft.VisualStudio.FSharp.ProjectSystem.ProjectReferenceNode..ctor(ProjectNode root, ProjectElement element)

at Microsoft.VisualStudio.FSharp.ProjectSystem.FSharpProjectReferenceNode..ctor(ProjectNode root, ProjectElement element)

at Microsoft.VisualStudio.FSharp.ProjectSystem.FSharpReferenceContainerNode.CreateProjectReferenceNode(ProjectElement element)

at Microsoft.VisualStudio.FSharp.ProjectSystem.ReferenceContainerNode.CreateReferenceNode(String referenceType, ProjectElement element, BuildResult buildResult)

at Microsoft.VisualStudio.FSharp.ProjectSystem.ReferenceContainerNode.LoadReferencesFromBuildProject(Project buildProject)

at Microsoft.VisualStudio.FSharp.ProjectSystem.ProjectNode.ProcessReferences()

at Microsoft.VisualStudio.FSharp.ProjectSystem.ProjectNode.Reload()

at Microsoft.VisualStudio.FSharp.ProjectSystem.FSharpProjectNode.Reload()

at Microsoft.VisualStudio.FSharp.ProjectSystem.ProjectNode.......

--------------------------- Abort Retry Ignore ---------------------------