Cannot use AdminUI on IE11

[Alekshar]

Expected behavior

From the AdminUI homepage, I want to get the list of contents for a model.

Actual/Current behavior

The list is stuck in the loading process

The developer console indicates :
Unable to get property 'length' of undefined or null reference.
File : admin.js, line : 20476, column : 3

Steps to reproduce the actual/current behavior

Try to access the AdminUI with IE11. The bug also appears in the Demo website.

Environment

Software	Version
Keystone	tried with 4.0.0-beta.5 , 7 and 8

[stennie]

This appears to be the same issue as #3734 which has a PR under discussion (#4641). We need some testing to confirm the fix works, but I'm going to close this as a duplicate.

Regards,
Stennie