Show users if room knows them

Also selects the current room in the rooms list

cove-tui/src/room.rs

@@ -36,9 +36,9 @@ struct Connected {
 }
 
 /// State for when a client has fully joined a room.
-struct Present {
-    session: Session,
-    others: HashMap<SessionId, Session>,
+pub struct Present {
+    pub session: Session,
+    pub others: HashMap<SessionId, Session>,
 }
 
 enum Status {
@@ -95,6 +95,10 @@ impl Room {
         room
     }
 
+    pub fn present(&self) -> Option<&Present> {
+        self.present.as_ref()
+    }
+
     async fn bg_task(room: Arc<Mutex<Room>>, config: &'static Config) {
         let mut room_verified = false;
         loop {