merge of maps which contain notes doesn't merge notes for the same element

In case there are the same elements in maps, merge is not merging their notes but is preserving notes for the element from one map and put it in Species notes. Maybe we could merge species notes with species notes, protein/gene notes with protein/gene notes and provide this in merged species?
Also, notes of Genes are duplicated (the last image in this issue, for gene PRKN).