[META] Session management view for Server

[jthrilly]

Currently, the only view that users have of interview sessions in Server is on the overview panel, which is constrained to 100 sessions (see #254).

We need to add a dedicated view to Server that shows an overview of all sessions.

Key considerations:

• [ ] A table/grid view, summarizing relevant session attributes (case ID, import data, interview date [?], etc.).
• [ ] Must allow deleting individual sessions.
• [ ] Must allow filtering and sorting by these attributes.
• [ ] Must be performant for large numbers of sessions (10,000)