[Feature]: Don't clear recently filtered messages with the clear button

[Yay295]

Checklist

• This is an issue for Hyperchat, not LiveTL. I will go to the LiveTL repo to report an issue for LiveTL.
• I have checked for a duplicate or similar issue. I made sure to check closed issues as well.
• I am not reporting a bug. If I am, I will use the bug report issue template.
• By submitting this issue, you agree to follow our Code of Conduct

Is your feature request related to a problem? Please describe.

I use the clear button a lot to clear the messages I've read so it's easier to see new messages, but sometimes I hit the clear button just after a new message is added before I've had time to read it.

Describe the solution you'd like

It would be nice it there was something like a 0.5 second window where new messages aren't removed by the clear button.

Expected behavior

It would be nice it there was something like a 0.5 second window where new messages aren't removed by the clear button. It may also be good to not show new messages in the background while the "Clear Messages?" popup is open.

Describe alternatives you've considered

No response

Anything else?

Previously filed for the old extension: RomainLK/ytc-filter#85