d78eb5ec99
while some scrolling issues where fixed since 6.0.1, some where introduced, namely: * for firefox, the correct event to listen to is 'wheel' not 'mousewheel' * the spinner scroll direction was incorrect * the boxOverflow scroll direction was incorrect * the boxOverflow scroll amount was too high functions were copied from extjs source, eslintified, and adapted Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>