fix(ui): Set max width on notebook dropdown#1

andyjakubowski merged 9 commits intomaindeepnote/jupyterlab-deepnote:mainfrom

andy/oss-93-set-max-width-on-notebook-dropdowndeepnote/jupyterlab-deepnote:andy/oss-93-set-max-width-on-notebook-dropdownCopy head branch name to clipboard