Logs pagination: Older logs button stops to work if start and end timestamp are the same

[ivanahuckova]

What happened:
When using pagination and user has large volume of logs, there can be edge case when all received log lines come in the same exact second. This is probably causing an issue where Older logs button becomes unresponsive. See
https://drive.google.com/file/d/1YPOprw8f9qADc7P0qTTRmJBFfOEfFhLn/view?usp=sharing (10:10) for example.

Environment:

• Grafana version: 9.4/main

[gabor]

@ivanahuckova do you think this will be fixed by #71728 ?

[ivanahuckova]

Yes.