Duplicate citation not auto-merging

[JaimieMurdock]

Literally copied a citation from someone's representative publications, and it was not obvious that it had detected the merge. Need to change UI to highlight this better. If I didn't know to look for it, would not have seen it: "Show similar citations"

Jones, M. N. & Mewhort, D. J. K. (2007). Representing Word Meaning and Order Information in a Composite Holographic Lexicon. Psychological Review, 114(1), 1-37.