Permanent icon bar on the right ?

This issue is related to:
- https://github.com/zakodium-oss/react-science/issues/243.

Currently when the panels are hidden it becomes practically invisible and the users do not know it exists.

One possibility is to have a permanent icon bar on the right that displays an icon for all the available panels (as defined in the global preferences).


Each panel could also have a little cross (close icon) on the right of the header to close it. I would remove the current behaviour of closing the panel by clicking on the header.

Only the 'open' panel would be displayed (the panel header would also be removed). Currently the closed panels take a big space and this would solve this issue. If you want to display a panel you would need to click on the corresponding toggle icon.


There could be as well a minimal width and if you try to reduce the size of the panels columns it would stop at the minimal width or close if you go over half of this minimal width like in vscode for example.