Something
Make selection widget respect order.
Import Tuple traitlet for Selection widget
Fix variable name
Fix readonly lock logic.
Don't magically convert values to a list of tuples.
Fix faulty interact tests
Typo fix
This feature was discussed in #6123, but it doesn't look like anything was ever incorporated into the IPython Notebook.

Here's a brief overview of the changes:

- Display of messages from other clients can be toggled on and off from within a notebook, either using the ``<M-m>e`` keyboard shortcut in the web UI, or through the option in the "Kernel" menu.
- notebook.js controls whether messages are displayed through a callback that is invoked from kernel.js when no callbacks are available for a message.
- The UI displays ``execute_input`` messages originating from an other clients in new cells at the end of the notebook. Output messages (``execute_result`` et al.) will only be displayed if a cell exists with a matching message ID.

Pending design questions:

- Should each ``execute_input`` message cause a new cell to be created?
- Should new cells be placed at the end of the notebook, or elsewhere? If the latter, what criteria should be followed?
Selection test fix
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Updated terminology to match the console/qtconsole
config settings and documentation more closely.

Unsolicited messages => output from other clients.
Increased notification message display time.
Merge remote-tracking branch 'upstream/master'
add pre/post-save hooks

- `ContentsManager.pre_save_hook` runs on the path and model with content
- `FileContentsManager.post_save_hook` runs on the filesystem path and model without content

- use pre_save_hook for things like stripping output
- use post_save_hook for things like nbconvert --to python
`--script` triggers post_save hook with nbconvert
update `--script` behavior to use `nbconvert --to script`
docstring
Removed keyboard shortcut.