disable a toolbar

[ceraolo]

Recently OMEdit has added a toolbar in the variables browser. that was not there the last time the user's guide was updated.
The toolbar I mean is highlighted by a red rounded rectangle in the png picture enclosed.

I think that toolbar is not frequently used, and indeed has not been there for years. But it occupies a significant part of the OMEdit window space.

I would appreciate if it could optionally e be hidden