Add 'For selected documents' trigger and 'Search users' action (#3353)

* iManage Work for Admins

* Update swagger

* Add 'For a selected document' trigger and actions for extended metadata

* Update property descriptions

* New Connector: iManage Insight Plus

* Add new action to copy permissions

* Update readme.md

* Add actions to update custom field

* Add wait_for_completion for trigger

* Update trigger description

* Update data format

* Add For selected documents trigger and Search users action