Is your feature request related to a problem? Please describe.
Currently there is a discrepancy between ViewBase.className and ViewBase.cssClasses property output -- if you try to get the className value it will not include any values that were added through cssClasses directly.

Describe the solution you'd like
This becomes especially problematic with #7606 that introduces "system" css classes for platform/device/orientation and presumably as a NativeScript developer you would need to be able to inspect them in Chrome devtools through the className attribute value.

Additional context
See #7725 (comment)