Add ability to look for roo in parent/first child comment

[kittsville]

Sometimes the linked roo is actually the parent roo (as they've linked to a "hold my X" comment) or the first child (they've linked to the misinterpretation comment). The ability to look for "a-roo" text, or similar, in either and then recover the chain would save it breaking where it currently does (and where it would again further down).