Unwanted behavior on query tab in Rev. 4304 / Windows 7 Home Prem. 32bit german

- Move divider line to adjust the height of query input field/result list, i.e. make 10 rows visible
- Minimize window by clicking on icon in taskbar
- Restore window by clicking on icon in taskbar
- Divider line moved automatically so that only 5 rows remain visible

Really annoying... ;)

Therefore, I had to revert to v7 stable

This is a workaround for a bug, I cannot revert that without breaking the initial bug again. See issue #2855.