Add metadata support

[yughcnerfyrgna]

IA's content blocks are really useful to my workflow and I use them a lot. They would be much more useful if the metadata of trancluded blocks was hidden the same way it is in their own preview. Could this be done? Thanks.

[antons]

Happy to hear that content blocks are useful to your workflow! Metadata is definitely something we’d like to support. We’ll update this issue as we improve content blocks.