In Selena EAP build 7718, when i press Ctrl-Q for Quick lookup, the popup window is correctly presented but scrolling could be only only via mouse. Arrow keys are moving with editor caret in source code from where I opened the popup.
When I tried the same in 7.0.2, it was working correctly.
Similar behavior is with Quick Definition Lookup, where arrow keys do not move with anything until the popup is closed.
I expect that arrow keys will move with content of popup in both cases.