Trying to clean up a little bit more (#5517)

Trying to clean up a little bit more (#5517)

* "post-type" replaces "bookmark" and "type"

* The permission set is now removed upon expiry

* Post update now stores the permission set

* We don't store the permissions in the item table anymore

* Postupdate now handles "postopts" as well

* "post-type" replaces "bookmark" and "type"

* "post-type" replaces "bookmark" and "type"

* "post-type" replaces "bookmark" and "type"

* The permission set is now removed upon expiry

* The permission set is now removed upon expiry

* We don't store the permissions in the item table anymore

* Postupdate now handles "postopts" as well

* Multiplicated update functions

* And some more duplicated functions ...

* Removed duplicate functions