I have some databases that have hundreds of tables within them. When they are showing, it's very time consuming to have to scroll all the time to see other databases or connections. To alleviate this problem, I would suggest that the top item that is visible would always be the item one level above.
For example, if I'm looking in the middle of a list of tables... the first line would always be "tables". If I scrolled up and selected "tables", the first line would then be the parent of "table", which would be the database.

In other words, I would always be able to move up the hierarchy of the tree by selecting the first row visible in the window.