Forward port to 10: Regression - Image cropping is broken in IE 8

Cropping images isn't working in IE 8

Reproduction path:

• Start IE8
• Log in into the demo environment https://cms.demo.onehippo.com
• Goto the images
• Goto events -> 2014 -> 05
• Open image 'Ford Model U.png'
• Try to crop the 'Thumbnail (large)' image

Actual result: Cropping box itself is not shown

Versions:
Hippo: 7.9.5
CMS: 2.26.11