Return a list of UserRegistration tables. Used to make sure all UR tables are dropped when uninstalling the plugin in a single site or multi site environment.
Display row meta in the Plugins list table.
Drop UsageMonitor tables.
Push all needed DB updates to the queue for processing.
Uninstall tables when MU blog is deleted.
Update DB version to current.
Create roles and capabilities.
Create pages that the plugin relies on, storing page IDs in variables.