General session dialog

This page is a capture in the deferred bucket of the product backlog — a pre-sprint idea, not yet pulled into a sprint as a story.

At present we can't see a dialog with sessions for all users. We need to go to accounts to see a specific user session. We need to modify this dialog to be able to show either all sessions or sessions for a specific user.

Notes:

• it should be possible to kick out a user or selection of users.
• it should be possible to send a message to a user or all users.
• session icon is just a circle
• add paging support.