Adding a new host sub tab: "Databases"

For situations where you need an overview on a larger set of databases, now you have a detailed view in the new "Databases" tab, left besides the "Variables", "Status" etc. The new tab displays database names, number of items in them, their collation, and the summed size of all items in them. Together with a colored bar and sorting options this should somehow be helpful in HeidiSQL's mission to make a developer's life easier:

Nice feature!

Although the rows remain empty until I click on every database in the left tree, is that the expected behaviour?

They remain empty until the tree or some other event needs to fetch their items into the internal cache. You can also press Ctrl+A to select all dbs, right click -> "Fetch database items".

Oh, I hadn't noticed that. Now I like the feature even more: getting info can be quite slow.

Yes, that's why this is done only when user explicitely wants.