Context Navigation

Changes between Initial Version and Version 1 of Ticket #54016, comment 4

initial	v1
13	13
14	14	… maybe this should be opt-in or a plugin? Because not everyone has large sites and a proper cronjob running, thus it would affect the (uncached) frontend in terms of performance.
	15
	16	I did not think about the optional media trash properly yet. If it is enabled, step 2 is probably not necessary. And step 3 depends on if the relations are also cleared on trashing the media (I believe they do but am not sure).