Visible crew/equipment: Charlotte wakes up in in the night. After that, she sits on the couch and grabs a magazine. The boom operator is visible reflected on the window above her. (01:06:40)
Visible crew/equipment: When Bob is taking a bath and receives a phone call from his wife, a microphone is visible in the upper left, coming from behind a wall for a few seconds.
Visible crew/equipment: In the scene after Bob and Charlotte walk by Kelly singing in the lounge, Charlotte is lying awake in bed. When she gets up and is putting on her long-sleeve shirt, in the reflection of the window there is someone walking out of the room and closing the door.
Answer: I believe that it means something like "good luck", as she hoped the production goes as smoothly as possible.