musicbrainz/picard — pull request #55 by voiceinsideyou (2012-06-01 16:51:49+00:00)
Title: PICARD-33: Make unmatched files default drop target for RHS -> LHS Album drops

As discussed in https://github.com/musicbrainz/picard/commit/e2c9f5df02d5b1743330e535acb81200049325b4#commitcomment-1394083

Possibly a more elegant OO-style way to fix this with can_accept_drop(type) and default_drop_target() type of logic in the various views; but this is what came to mind quickly :)