New popup menu for the editor and viewer attachments (Open, Print, Save As, Save All), also utilizes double click and keyboard Backspace/Delete/Enter keys
Opening/executing/printing a file or URL shows detailed error if there is one (e.g. file type not associated with any program, no default web browser etc.), instead of giving up without notice
Mouse wheel now scrolls control under the pointer without the need to click on that control first
Save attachments window is now reusable so it can be used for Save Attachments from preview pane or Save All from message viewer
Save attachments remembers last used folder (for each identity)
Bug fixes
Keyboard tab switching didn't select first item in the list of attachments for edit and viewer window
Displayed message is no longer reloaded for some operations like Save As or Add Sender to Address Book, instead it uses a persistent copy in the memory (which makes these operations faster)
Save attachments window closes when Esc key is pressed