EMAIL: Function for deleting lots of messages quickly

[bobbimanners]

Would be really handy for cleaning up Usenet news group folders when we get short of disk space. Right now it is very tedious. Maybe we need a function to mark all messages from current to end as deleted. Will need some serious "Are you sure?" prompting.

[bobbimanners]

Work in progress.

[bobbimanners]

This seems to be working. Checked into develop branch.

[bobbimanners]

I removed this feature because it was the straw that broke the camels back for memory usage! Instead, I made the 'D' (Delete) and 'U' (Undelete) command auto-advance to the next message, which is quite a convenient way to delete messages in bulk.

This is a better solution because:

• Uses less memory
• Doesn't need a new keybinding (and sensible keys are hard to find at this point)
• Doesn't need a corresponding undo function (auto undelete to end of folder or something) to be implemented
• Is less risky / less likely to surprise the user

[bobbimanners]

2.1.0 released.