Intent of chatWidgetHistoryService.test|title=ChatHistoryNavigator should stop at start when navigating backwards|occurrence=1

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
  - contrib/ 4 tests
    
    chat/ 4 tests
    
    test/ 4 tests
    
    common/ 4 tests
    
    widget/ 4 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/widget/chatWidgetHistoryService.test|title=ChatHistoryNavigator should adjust cursor when history is cleared|occurrence=1 Inherited chatWidgetHistoryService.ts ×1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/widget/chatWidgetHistoryService.test|title=ChatHistoryNavigator should navigate backwards through history|occurrence=1 Inherited chatWidgetHistoryService.test|title=ChatHistoryNavigator should navigate backwards through history|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/widget/chatWidgetHistoryService.test|title=ChatHistoryNavigator should navigate forwards through history|occurrence=1 Inherited chatWidgetHistoryService.test|title=ChatHistoryNavigator should navigate forwards through history|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/workbench/contrib/chat/test/common/widget/chatWidgetHistoryService.test|title=ChatHistoryNavigator should stop at start when navigating backwards|occurrence=1 Introduced here