Vscode-powershell: Prompt written on Linux or macOS has black background

[daviwil]

Originally reported by @joeyaiello, and I've seen it too on macOS:

https://github.com/PowerShell/vscode-powershell/issues/594#issuecomment-290576005

Need to keep using the existing Console.BackgroundColor instead of changing it to black.

[Happycoil]

With VS Code 1.12.0 you can work around this issue by adding the following to settings.json:

"workbench.colorCustomizations": {
    "terminal.ansiBlack": "#1E1E1E"
}

This is for Dark+, replace 1E1E1E with the appropriate color for your theme.

[mklement0]

Unfortunately, this is still broken as of v1.4.3 on macOS 10.13, shown here with the "Light+" color theme:

To spell out the workaround for white-background themes, courtesy of @Happycoil's tip:

   "workbench.colorCustomizations": {
      "terminal.ansiBlack": "#fff"
    }

[daviwil]

The fix for this issue hasn't actually been shipped yet, hoping to get it out this week.