Kibana version: 7.1.0 (7.x branch snapshot)

Elasticsearch version: 7.1.0 (7.x branch snapshot)

Server OS version: Ubuntu 14

Browser version: IE11

Browser OS version: Windows 10

Original install method (e.g. download page, yum, from source, etc.): tar.gz files (default distribution with security enabled)

Describe the bug: My understanding was that in 7.x Kibana would have an error or warning about insecure browser on IE11.
And in master with default settings it would not load (but you could bypass by setting csp.strict: false on master and keep using IE11).

But I could be wrong on that ^?

Steps to reproduce:

1. Try Kibana from 7.x branch (currently 7.1.0) on IE11
   It never loads. Just shows;