Don't consider sessions past if they are still in progress

[bcm]

Show sessions that are currently in progress as upcoming sessions in all dashboard, games, and events views.

Currently a session is treated as past as soon as the slot starts.

• Consider listing in-progress sessions as such (rather than upcoming or past)
• Consider allowing signups for in-progress sessions

Benefit: fewer clicks to look up information about signups for a currently active session.