Edit memory with pager

[infringer]

Currently when using pager, if you edit stuff on page 1 then go to
page 2. The editing you have done on page 1 is lost. My suggestion
could be solved in 2 ways.

1) The grid should prompt you and say, "You have unsaved data, are
you sure you want to leave?"
2) The grid should save the modifications in memory and then when the
table is saved, make the changes from all pages.

Same thing should happen for added or deleted rows.

Also, the table should have a "unsaved" state notification somewhere.
Similar to the changed cell icon. Just have the table add the words
"Work is unsaved" or a little icon or something.

-David