Github user andruhon commented on the issue:
https://github.com/apache/wicket/pull/255
@svenmeier I would agree that this legacy workaround is not a good thing
for Wicket 8. IE 9 share is averagely less than 1% nowdays and keeps dropping.
Those who need a legacy support of IE 6 and 7 can use Wicket 6. Thank You. Just
let me know If I can help you with this.---
