Expose the messages UI to all users, regardless of permissions to send DMs

[Heliosurge (Dan DeMontmorency)]

This plugin should be added to core

Allow-pm-to-staff

Summary Allow all users to PM Staff Repository Link https://github.com/pfaffman/discourse-allow-pm-to-staff Install Guide How to install plugins in Discourse Features Allow users to send a PM to staff even if they would not otherwise be able to send a PM. Configuration allow_pm_to_staff_enabled–Enables the plugin (default true) allow_pm_allowed_pm_groups–Set groups who can receive PMs from all users (default “staff”). S…