add balldevice_ball_device_ball_eject_attempt.md clone to events/queue_events/ as a hack

For whatever reason (probably ordering somewhere in mkdocs or even the host OS) this page is the only
one of the pages listed in the Queue Events duplicate reference that hijacks where the nav shows that you are.
The rest show you in their normal group even when clicked from the Queue Event sub listings.

The real fix here is for each of the queue event duplicate listings to get a second file, so that
inbound links can decide which context in which to show the event. Alternatively we could
make the queue event links all nested in queue_events/ but then make them all just redirects to the real locations.

Author: bosh

docs/events/queue_events/balldevice_ball_device_ball_eject_attempt.md

@@ -0,0 +1,40 @@
+---
+title: balldevice_(name)_ball_eject_attempt
+---
+
+# balldevice_(name)\_ball_eject_attempt
+
+
+--8<-- "event.md"
+
+Event is posted by [ball_devices:](../../config/ball_devices.md)
+
+The ball device called (name) is attempting to eject a ball (or
+balls). This is a queue event. The eject will not actually be attempted
+until the queue is cleared.
+
+## Keyword arguments
+
+(See the [Conditional Events](../overview/conditional.md)
+guide for details for how to create entries in your config file that
+only respond to certain combinations of the arguments below.)
+
+#### `balls`:
+
+The number of balls that are to be ejected.
+
+#### `mechanical_eject`:
+
+Boolean as to whether this is a mechanical eject.
+
+#### `num_attempts`:
+
+How many eject attempts have been tried so far.
+
+#### `source`:
+
+The source device that will be ejecting the balls.
+
+#### `target`:
+
+The target ball device that will receive these balls.

mkdocs.yml

@@ -1151,7 +1151,7 @@ nav:
       - ball_ending: events/ball_ending.md
       - mode_(name)_starting: events/mode_name_starting.md
       - mode_(name)_stopping: events/mode_name_stopping.md
-      - balldevice_(name)_ball_eject_attempt: events/balldevice_ball_device_ball_eject_attempt.md
+      - balldevice_(name)_ball_eject_attempt: events/queue_events/balldevice_ball_device_ball_eject_attempt.md
 
     - Audio Management Events:
       - master_volume_decrease: events/master_volume_decrease.md