clear all the queues on exit.

server.py

@@ -329,6 +329,28 @@ class BAPSicleServer:
 
         del self.player
 
+        print("Deleting all queues.")
+        # Should speed up GC on exit a bit.
+        queues = [
+            self.player_to_q,
+            self.player_from_q,
+            self.ui_to_q,
+            self.websocket_to_q,
+            self.controller_to_q,
+            self.file_to_q,
+        ]
+        for queue in queues:
+            if isinstance(queue, List):
+                for inner_queue in queue:
+                    while not inner_queue.empty():
+                        inner_queue.get()
+                    del inner_queue
+            elif isinstance(queue, Queue):
+                while not queue.empty():
+                    queue.get()
+        for queue in queues:
+            del queue
+
         print("Stopped all processes.")