Intent of themeConfiguration.ts ×22

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 4 tests
- workbench/ 4 tests
  - services/ 4 tests
    
    themes/ 4 tests
    
    test/ 4 tests
    
    common/ 4 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/services/themes/test/common/workbenchThemeService.test|title=WorkbenchThemeService migrateThemeSettingsId migrates Default-prefixed theme IDs|occurrence=1 Inherited workbenchThemeService.ts ×3
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/services/themes/test/common/workbenchThemeService.test|title=WorkbenchThemeService migrateThemeSettingsId migrates Experimental theme IDs to VS Code themes|occurrence=1 Inherited workbenchThemeService.ts ×2
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/services/themes/test/common/workbenchThemeService.test|title=WorkbenchThemeService migrateThemeSettingsId returns unknown IDs unchanged|occurrence=1 Inherited workbenchThemeService.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/services/themes/test/common/workbenchThemeService.test|title=WorkbenchThemeService restores only for preferred color scheme changes|occurrence=1 Inherited themeConfiguration.ts ×5