If we put some host on a maintenance, it would be nice that other triggers that depends on that host could automatically be in maintenance mode too.
Today we have to verify all hosts that should be affected by one host in maintenance mode and put on the maintenance too.
This feature will also help with monitoring of web scenarios that depends on one host. If that host is included in one maintance, the trigger of the web monitoring should also enter in maintenance mode as it is dependend of the host.