Enable CSP in Icinga Web resulting in small grafana panel

[ErwinE]

Enabling CSP in Icinga Web 2 results in a very small grafana panel (iFrame access mode)

Expected Behavior

Current Behavior

Steps to Reproduce (for bugs)

1. Use Grafana Module with Icinga Web 2 with iFrame mode
2. Enable CSP in Icinga Web 2 / Configuration / Application / Enable strict content security policy
3. See the result

Your Environment

All modules and icinga related software versions are up to date

[martialblog]

This is caused by the inline styles, you can probably see the errors in the browser's console

See: NETWAYS/icingaweb2-module-grafana#14