Maybe i'm so stupid and just don't know something, but in new version of AquaMail there is no groupic mails by date ;-(
Just before update i could just click on the date and all mails by day was 'ticked' and that was so easy method to check all yesterday messages as readed...
Now i cant do that and must to check mails one by one or by loooong swype with finger, which is not so perfect.