There seems to be a bug & or a feature completely missing from the dashboard. You cannot set a shared-with-you DB as your default. Once you leave the page & come back it reverts the default to a DB made by yourself.
Different environments require ever-changing DB views & it would be nice to be able to just have the DB as my main & it updates any time the owner makes a change. Instead of having to go and save the view everytime a change is made