Search&Replace and Table of Content extension occupy the same place

[jankatins]

See this screenshot:

Not sure how to handle this, what should go where... On the other hand, S&R seems to get included in notebook proper (jupyter/notebook#285 and jupyter/notebook#558), so the extension can probably be dropped after the next notebook release...

[juhasch]

We could save the position of the searchbar, so it stays there when moved.
But I guess you are right, if the new builtin functionality works we can remove the extension.

[jankatins]

This can probably be removed as the s&r functionality is obsolete with the new UI in the notebook