Rename TestApp folder.

src/Triangle.sln

@@ -1,13 +1,13 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.31025.194
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32126.317
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Triangle", "Triangle\Triangle.csproj", "{F7907A0A-B75F-400B-9E78-BFAD00DB4D6B}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Triangle", "Triangle\Triangle.csproj", "{F7907A0A-B75F-400B-9E78-BFAD00DB4D6B}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mesh Explorer", "TestApp\Mesh Explorer.csproj", "{336AAF8A-5316-4303-9E73-5E38BD0B28AF}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MeshExplorer", "MeshExplorer\MeshExplorer.csproj", "{336AAF8A-5316-4303-9E73-5E38BD0B28AF}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Triangle.Rendering", "Triangle.Rendering\Triangle.Rendering.csproj", "{41022E0E-BD0F-439E-BC3A-AABB1B43471B}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Triangle.Rendering", "Triangle.Rendering\Triangle.Rendering.csproj", "{41022E0E-BD0F-439E-BC3A-AABB1B43471B}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -45,4 +45,7 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {90F4F9E9-43D6-4A3D-91D5-B2DF113E13AE}
+	EndGlobalSection
 EndGlobal