BUG: Incompatibility with Flowpack/media-ui for uploading an asset

[rolandschuetz]

Then opening the link editor and going to the media ui tab, the new media UI has a button "Upload file" that opens a modal, this modal has a z-index of 55, which is less than the one from Archaeopteryx and so you can't upload a media file here.

My current workaround is to inject this CSS in the backend:
Settings.yaml

Neos:
  Neos:
    Ui:
      resources:
        stylesheets:
          'YOUR_PACKAGE_NAME/ArchaeopteryxFix':
            resource: 'resource://YOUR_PACKAGE_NAME/Public/ArchaeopteryxFix.css'

ArchaeopteryxFix.css

/* workaround for the https://github.com/sitegeist/Sitegeist.Archaeopteryx/issues/92 with the media module */
section[role="dialog"] + section[role="dialog"][class*="__mediaModuleTheme___"] {
    z-index: 101;
}