Add inline preview like sublime LaTeXTools

[wolfv]

E.g.

undefined.-.Imgur.mp4

[mpacer]

This is out of scope for a while, but not an unreasonable request.

@ian-r-rose, do you concur?

[ian-r-rose]

I think it would be really cool, but there are a few things that would need to happen first.

I think it might be nice to plug this in to the completer machinery, so you could tab-to-preview an equation. There are already some plans to hook a completer up to a text editor, so if that were made sufficiently pluggable, we could try to use the client-side equation renderer in a hover box.

Actually putting it inline would be fairly tricky to negotiate with the Codemirror instance, thought it may be possible.