pkp/pkp-lib#10511 menu item of type series without content even when they exist in the OMP 3.4 #179

Job	Run time
omp (8.1, validate)	5m 35s
omp (8.1, validate)	5m 35s
omp (8.1, pgsql, test)	28m 11s
omp (8.1, pgsql, test)	39m 44s
omp (8.1, mariadb, test)	35m 39s
omp (8.1, mariadb, test)	35m 39s
omp (8.1, mysql, test, upgrade, 3.1.0,3.1.1-2,3.1.2,stable-3_2_0,stable-3_2_1,stable-3_3_0)	37m 3s
omp (8.1, mysql, test, upgrade, 3.1.0,3.1.1-2,3.1.2,stable-3_2_0,stable-3_2_1,stable-3_3_0)	37m 3s
omp (8.2, mysql, test)	35m 0s
omp (8.2, mysql, test)	35m 0s
omp (8.2, pgsql, test)	28m 17s
omp (8.2, pgsql, test)	28m 17s
	5h 51m 3s

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