title: Conditioning VS Code settings property on preferred system color theme
body: <p>I want to set a property in VS Code settings such that it conditions on the system's preferred color theme.</p>
  <p>VS Code allows you to detect color scheme by setting <code>workbench.autoDetectColorScheme</code> to <code>true</code>. Then you can set color themes for the properties - <code>workbench.preferredLightColorTheme</code> and
  <code>workbench.preferredDarkColorTheme</code>.</p>
  <p>Is there any way to set properties like <code>terminal.background</code> such that they change along with the workbench color theme?</p>