Dev Dock: screenshotting fails in apps other than VxAdmin & VxPrint, because it uses global styles outside of wrapper

[adghayes]

We should be more consistent about at what level we incorporate the Dev Dock, or remove the dependency on modal that I added in #7291.

[adghayes]

Also noting that we are inconsistent about our use of "Strict Mode" - not in VxCentralScan for example.