No suggestions for clause or operator values before typing "

For example pressing Ctrl+Space with the cursor placed behind `"if": ` we do not get any suggestions. We need to type `"` first to make it work. Previously it was possible to use boolean `true/false` here (without `"`). Maybe that's why. But this is no longer allowed anyway. Same thing for operator values where we used to allow numbers like `100` instead of strings like `"100"`. So we probably do not get suggestions when the cursor is placed behind `"limit_to": ` for the same reasons.