The 'PowerShell' extension is recommended for this file type

System Details

System Details Output

### VSCode version: 1.41.1 26076a4de974ead31f97692a0d32f90d735645c0 x64

### VSCode extensions:
ms-vscode.powershell-preview@2019.12.0


### PSES version: 2.0.0.0

### PowerShell version:

Name                           Value
----                           -----
PSVersion                      5.1.17763.771
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.17763.771
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Issue Description

I have just uninstalled VSCode and deleted %AppData%\Code and %UserProfile%\.vscode, before reinstalling VSCode and only the PowerShell Preview extension, just to make sure there isn't any dodgy extension causing the problem(s).

Expected Behaviour

Nothing.

Preferably, even though I have the Preview version installed, I shouldn't see this.

Actual Behaviour

After opening VSCode and then *opening a .ps1 file, I get a VSCode notification in the bottom right of the screen that reads: "The 'PowerShell' extension is recommended for this file type"

* If a .ps1 file was open in the last session, I get the notification on start-up.

Attached Logs

Follow the instructions in the troubleshooting docs
about capturing and sending logs.

[rjmholt]

This is tracked in microsoft/vscode#80178