PHRAS-3884 advanced search sort field by label #256

Job	Run time
build phraseanet-nginx / build	3m 6s
build phraseanet-setup / build	4m 33s
build phraseanet-fpm / build	4m 30s
build phraseanet-db / build	30s
build phraseanet-worker / build	3m 56s
build phraseanet-elasticsearch / build	36s
unit test	8m 11s
	25m 22s

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