Scripts open up in another editor even if Visual Studio is selected as an external code editor.

Steps To Reproduce

1. Create a Project.
2. Project Window> Right click > Create > C# script.
3. Double click on the script to open it up.

Stack Trace:

1. Exception thrown while invoking [OnOpenAssetAttribute] method 'Unity.CodeEditor.CodeEditor:OnOpenAsset (int,int,int)' : Win32Exception: ApplicationName='/Users/macmini6/Downloads/New Unity Project (106)/Library/PackageCache/com.unity.ide.visualstudio@1.0.3/Editor/COMIntegration/Debug/COMIntegration.exe', CommandLine='"/Applications/Visual Studio.app" "/Users/macmini6/Downloads/New Unity Project (106)/Assets/CSharpWithObsolete.cs" "/Users/macmini6/Downloads/New Unity Project (106)/New Unity Project (106).sln" -1', CurrentDirectory='', Native error= Access denied
System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) (at <d465e2b2e5054d2787d6364114c43446>:0)
System.Diagnostics.Process.Start () (at <d465e2b2e5054d2787d6364114c43446>:0)
(wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
VisualStudioEditor.VSEditor.OpenProject (System.String path, System.Int32 line, System.Int32 column) (at /Users/builduser/buildslave/unity/build/build/libcache/Library/PackageCache/com.unity.ide.visualstudio@1.0.3/Editor/VSEditor.cs:394)
Unity.CodeEditor.CodeEditor.OnOpenAsset (System.Int32 instanceID, System.Int32 line, System.Int32 column) (at /Users/builduser/buildslave/unity/build/Editor/Mono/CodeEditor/CodeEditor.cs:55)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
--------------------------------------------------------------------------------------------------------------------------------------------
2. Win32Exception: ApplicationName='/Users/macmini6/Downloads/New Unity Project (106)/Library/PackageCache/com.unity.ide.visualstudio@1.0.3/Editor/COMIntegration/Debug/COMIntegration.exe', CommandLine='"/Applications/Visual Studio.app" "/Users/macmini6/Downloads/New Unity Project (106)/Assets/CSharpWithObsolete.cs" "/Users/macmini6/Downloads/New Unity Project (106)/New Unity Project (106).sln" -1', CurrentDirectory='', Native error= Access denied
System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) (at <d465e2b2e5054d2787d6364114c43446>:0)
System.Diagnostics.Process.Start () (at <d465e2b2e5054d2787d6364114c43446>:0)
(wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
VisualStudioEditor.VSEditor.OpenProject (System.String path, System.Int32 line, System.Int32 column) (at /Users/builduser/buildslave/unity/build/build/libcache/Library/PackageCache/com.unity.ide.visualstudio@1.0.3/Editor/VSEditor.cs:394)
Unity.CodeEditor.CodeEditor.OpenFileAtLineColumn (System.String path, System.Int32 line, System.Int32 column) (at /Users/builduser/buildslave/unity/build/Editor/Mono/CodeEditor/CodeEditor.cs:31)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Expected Result: Visual Studio opens up.

Observed Result: Another code editor other than visual studio opens up.

Reproducible On: 2019.3.0a1(Trunk), 2019.2.0a12

Not Reproducible On: 2019.2.0a11