Suggestion: Multiple Recipients on web interface

I would love to be able to separate multiple friends with commas or something.
More than often I want to send the same message to a few people, would help a lot ;)

Start at the web interface's recipient input and trace how a single recipient is entered and submitted. Confirm the expected separator and behavior for several recipients, then verify that one message can be addressed to all of them without breaking the existing single-recipient flow.

Written by the indexing model from the issue text.