In SQL Notebooks we would want the Tables/Queries left pane to be resizeable. This is because our table names are preffix with the environment name and then the project ID which means that there are only a few characters left visible for the table name, sometimes not even that (see sample below). We would like to be able to resize the left pane so we can see tables with longer names. We are aware that you can hover over the name to see the full table name but that's not a quick way to find the table you are looking for. Search is also a possibility but sometimes you don't know what you are looking for (ie when exploring).
