Checking of page classes/blocs classes

Currently blocsapp gives no feedback whatsoever about the classes applied to a page - whether they exist or not.

Ideally it would work in the same way as classes applied to blocs or at least highlight them in red to show they don’t exist as far as blocsapp is concerned.

In general I would say it is safer to show new classes created in blocsapp with a red highlight so that it’s clear that while blocsapp may create a class, it hasn’t yet been edited.