[RCU] Mark whole folder as read

Hello,

Simple question, is there a way to mark a whole folder as read? There are some cases where this would help a bit, for example the linux kernel mailing list can easily deliver like 500 mails a day, so in a single weekend I can get more than a thousand mails on the same folder, and it's quite annoying to be marking them page after page.

I'd like to be able to just search for the relevant topics and then mark the rest as read by selecting the folder and clicking the relevant option. However I don't seem to be able to do that, which is why I am asking.

Thanks beforehand for any response.