Just simple suggestion, can we allow the area of Spaces, Data Lakes & Sources on the left pane to be expand/collapsible and resizable. I think it will be useful especially when u have growing list of items and need to focus on certain thing instead of viewing everything.
In the next release we are enabling External Sources to be collapsed in the side bar, to help users focus on the Spaces and Data Lake sources available for when that makes sense. Hopefully this helps improve the visibility here.