MDL-47883 admin: Fix missing string in the plugin validation
Merge branch 'MDL-47883-master-foundlangfile' of git://github.com/mudrd8mz/moodle
MDL-48006 Atto autosave: Never restore text that is empty.
MDL-47758 tool_monitor: Fixing behat tests after MDL-47810 changes
MDL-47862 event_monitor: Fix context for capability check on subscription page
MDL-47862 tool_monitor: Fix tool monitor navigation tree

Added event monitor rules link to the frontpage navigation tree, when
editing the frontpage rules. Added hack so that when viewing the site
context subscriptions, the link in navigation is correct, allowing the
breadcrumbs to appear