Make code folding hovers turn to dialog or similar on mouse over or click

Code folding is great and getting a popup that shows the folded code is nice, too. However, sometimes the popup contains too many lines to see them all but moving the mouse to the popup makes it disappear.
Instead I'd like to be able to transfer the focus into the popup and to get scrollbars in order to scroll the code hover. As a bonus it should be possible to mark text and copy it into the clipboard.