NEW: Add IsFirst/IsLast methods to match SS5 conventions (closes #1274) #3

Job	Run time
CI / Context	1s
CI / Generate matrix	10s
CI / Check governance	1s
CI / 8.1 prf-low mysql57 phpunit all	3m 21s
CI / 8.2 mariadb phpunit all	1m 7s
CI / 8.3 mysql80 phpunit all	1m 18s
CI / 8.1 mysql57 phplinting	1m 10s
CI / 8.1 mysql57 endtoend root job1	1m 55s
CI / 8.3 mysql80 endtoend root job1	2m 31s
CI / 8.1 mysql57 endtoend root job2	2m 2s
CI / 8.3 mysql80 endtoend root job2	2m 25s
CI / 8.1 mysql57 endtoend root job3	1m 42s
CI / 8.3 mysql80 endtoend root job3	2m 24s
CI / 8.1 mysql57 endtoend root job4	2m 10s
CI / 8.3 mysql80 endtoend root job4	1m 58s
CI / 8.1 mysql57 endtoend root job5	1m 47s
CI / 8.3 mysql80 endtoend root job5	2m 24s
CI / 8.1 mysql57 endtoend root job6	1m 42s
CI / 8.3 mysql80 endtoend root job6	2m 31s
CI / 8.1 mysql57 endtoend root job7	1m 44s
CI / 8.3 mysql80 endtoend root job7	2m 4s
CI / 8.1 mysql57 js	1m 25s
CI / 8.1 mysql57 doclinting	1m 9s
CI / Dispatch tag patch release	0s
	39m 1s

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