[Bug / Feature Request] IDLE Shell

[rantingrick]

Hello folks,

In the IDLE shell when pressing the key combos "Control+Up" and
"Control+Down" the insertion cursor should jump to the nearest prompt
(>>>) above or below it's current position respectively.

Note: In the Editor Window of IDLE the current behavior is for the
insertion cursor to jump to the next block (which is just fine for the
Editing Source code!) HOWEVER in the shell we need a much more
intelligent behavior.

py> shell != editor
True