Hello!
I don’t know if it is correct to add a feature request to an existing plugin thread, so sorry for that.
I miss a specific feature for a shortcut, namely “toggle unread status for selected messages”. That is a nice feature in Thunderbird, where I press “m” and the message(s) are toggled read/unread. This even works for multiple marked messages, but I have to check if all messages then are getting read or unread.
There is an option for “set marked messages to read” or unread, respectively. Would it be possible to use this function for the shortcut?