* Update indexes on ticket model * Tweak ticketer default names * Add empty ticket list treatment * Fix API docs for messages endpoint to mention attachments rather than the deprecated media field * Update to editor with hidden internal ticketers * Consistent setting of modified_by when releasing/archiving/restoring * Remove old ticket views * Change ticketer sections on org home page to have Remove button and not link to old ticket views * Add assignee to ticketing endpoints, some new filters and new assignment view