Khoros Communities 19.12 brings:
New Features
API Updates
Bug Fixes
New Features
Group Hubs GA
Private Messages v3 GA
Enhancements to Search Subscriptions GA
Group Hubs GA
I...
Updated 6 months ago
Version 8.0
Blog Post
For your question on copy pasting a list into the Sendto field for PMs:
The feature enables you to copy paste comma-separated usernames. For example, to include AshaC, SohilM and SuzieH into the recipient list, you have to copy paste "AshaC, SohilM, SuzieH" into the Sendto list. There is no provision to upload a csv file.
W.r.t. your question on Group Hubs:
You will be able to select the Group Hub and add it to the recipient list (Sendto field). When added, Sendto field populates the name of GroupHub (It is the title of the Group Hub shown in the community). Currently, because of a bug, it does not show the name but adds the GroupHub to the recipient list as node(Forum). However, this still sends out a private message to all the members of the GroupHub.
Hope this helps.