I don't know if this has been suggested before but I find it annoying that if you tick some emails to do something, let's say to mark them as read, the tick disappears when you have done that, so that if you want to do something else with the same emails, for example move them to another folder, you have to tick them all over again.

 

It would be much better if the green tick remained until your final action, after which you could click on the box at the top of the ticks column to clear them all at once.