ClassIn for Chromebook 4.4.5.1 [free]

1. Support open edlink files outside the classroom
2. Add a prompt for closed or muted accounts in clients
3. Limit the chat message withdraw time to within 2 mins
4. Optimize the UI of the Seats aera in the classroom
5. Support class over before the preset time
6. Prompt to notify students that they will automatically exit the classroom if switch ClassIn to background under focus mode
7. Show the laser pointer constantly on the student side

• 06/15/2022: ClassIn for Chromebook 4.4.5.1
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