- Downgrade to 4.2.6
* Maintain autosave timers while disconnected #16903 (@holzman)
* Use class instead of id in the log console test #16723
(@krassowski)
- Downgrade reason: Notebook is not ready for jupyterlab 4.3 yet

- Update to 4.3.0
## New features added
* Notebook minimap in the virtual scrollbar #16432 (@krassowski)
## Enhancements made
* Change "File Size" column name to "Size" at small widths #16849
(@JasonWeill)
* Adds command to toggle cell outputs #16833 (@JasonWeill)
* Improve notebook output stream processing #16814
(@davidbrochart)
* Update Show Virtual Scrollbar -> Show Minimap #16776 (@jtpio)
* Clean up SVG icons from @jupyterlab/ui-components and update
SVGO #16678 (@joaopalmeiro)
* Convert @jupyterlab/completer type colors to theme CSS
variables #16656 (@joaopalmeiro)
* Adopt a theme CSS variable for the "expand a collapsed cell"
button shadow #16653 (@joaopalmeiro)
* Implement resizing for the file browser #16646 (@krassowski)
* Add kernel selection to Galata notebook creation #16639
(@pauldruce)
* Option to disable cell toolbar #16637 (@JasonWeill)
* Update pending input message for clarification #16632 (@RRosio)
* Standardize dialogs to shut down all kernels #16629
(@joaopalmeiro)
* Standardize the button role and label for single, dismissal