FIX Don't try to save blocks in a readonly elemental area #1195

Job	Run time
CI / Generate matrix	21s
CI / Context	1s
CI / Check governance	0s
CI / 8.1 prf-low mysql57 phpunit all	3m 0s
CI / 8.2 mariadb phpunit all	3m 24s
CI / 8.3 mysql80 phpunit all	3m 12s
CI / 8.3 mysql84 phpunit all	3m 34s
CI / 8.1 mysql57 phplinting	1m 58s
CI / 8.1 mysql57 endtoend root job1	10m 42s
CI / 8.3 mysql80 endtoend root job1	10m 6s
CI / 8.1 mysql57 endtoend root job2	10m 8s
CI / 8.3 mysql80 endtoend root job2	9m 11s
CI / 8.1 mysql57 endtoend root job3	9m 18s
CI / 8.3 mysql80 endtoend root job3	10m 16s
CI / 8.1 mysql57 endtoend root job4	9m 0s
CI / 8.3 mysql80 endtoend root job4	10m 53s
CI / 8.1 mysql57 endtoend root job5	6m 19s
CI / 8.3 mysql80 endtoend root job5	8m 4s
CI / 8.1 mysql57 endtoend root job6	9m 54s
CI / 8.3 mysql80 endtoend root job6	10m 6s
CI / 8.1 mysql57 endtoend root job7	10m 49s
CI / 8.3 mysql80 endtoend root job7	12m 7s
CI / 8.1 mysql57 js	5m 26s
CI / 8.1 mysql57 doclinting	2m 51s
CI / Dispatch tag patch release	0s
	2h 40m 40s

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