disable bulk buttons if selection is empty #33874

Job	Run time
Unit (7.4, Phpunit)	1m 51s
Unit (7.4, Phpunit Lowest)	1m 55s
Unit (8.0, Phpunit)	1m 47s
Docs	34s
Unit (8.0, Phpunit Lowest)	1m 57s
Behat (8.1, Chrome)	5m 25s
Behat (8.1, Chrome Lowest)	5m 30s
Unit (8.1, Phpunit)	1m 55s
Smoke (latest, Phpunit)	27s
Smoke (latest, CodingStyle)	50s
Behat (8.2, Chrome)	5m 38s
Unit (8.1, Phpunit Lowest)	2m 6s
Smoke (latest, StaticAnalysis)	42s
Behat (8.2, Chrome Lowest)	5m 32s
Unit (8.2, Phpunit)	1m 56s
Behat (8.3, Chrome)	5m 29s
Unit (8.2, Phpunit Lowest)	2m 5s
Unit (8.3, Phpunit)	1m 45s
Behat (8.3, Chrome Lowest)	5m 33s
Unit (8.3, Phpunit Lowest)	2m 2s
Behat (latest, Firefox)	5m 43s
Unit (latest, Phpunit Burn)	4m 41s
Behat (latest, Chrome Slow)	10m 4s
Behat (latest, Firefox Slow)	8m 19s
	1h 23m 46s

Provide feedback