handle complex quoted queries

[Instant Search]

handle typeahead when quoted to handle the following cases:

• “termA termB” termC
• termC “termA termB”
• “termA termB” “termC termD”
• “termA termB” termE “termC termD”

related to #13

Typically these don’t get that long, but important to handle for these cases:

• during typeahead search
• when returning excerpts for typeahead search
• during advanced search (hitting a button)

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