CM: Parse partial strings as strings

[fonsp]

It would be nice if a partially written string was parsed as a string:

This is awkward when typing something like school = "fun", writing "fun will autocomplete function, but we don't want autocomplete in strings.

It looks like the JavaScript mode does this:

[fonsp]

@Pangoraw Do you know how we can get this?

[fonsp]

Random guess: Maybe these should be moved higher in that list, like here?