[Feature] Open message in window from message and conversation view

I would like to add new option to context menu to allow opening message from message and conversation view.
Now, context menu on messages list is (marked open message option):

And conversation view (right click on conversation view title/header) context menu:

Apart from menu differences (message body context menu is third different one - also without open option), in menus other then message list, there are no message open option.
I propose new feature to add new option " Open" to all message menus.