Feature Request: Show state key of state events

[sebix]

The state events view of rooms shows the content of state events, but often the essential information is in the state_key field of the event. For example in m.space.parent events, the parent space is in the state_key, while the content doesn't say much. In m.room.member events, the state_key holds the actual member's user ID, while the content has the display name and membership type