Option to force users to set a schedule in order to mute / unmanaged nodes.

Option to force users to use the schedule in order to mute / unmanaged nodes for users.

1. Option in user settings to force users to schedule in order to mute / unmanaged nodes for users who have Node Management.

2. Option in user settings to turn node unmanaged off for users who have Node Management.  Users will have only mute node rights.