Improve Intellisense

[mattjohnsonpint]

When Intellisense works (see #2), it's still not quite what I expect.

I have to type at least // : and press ctrl-space to see the dropdown.

It would be much nicer if the dropdown showed up as soon as I enter a : (as long as I'm in a comment).

[jbevain]

Yeah I made it this way because currently we do not detect that we're in a comment, and we even allow emojis outside of comments. That needs to be fixed first. Otherwise you're going to get prompted whenever you use a C# ternary expression :)