Warn before network restart

There are some actions a user can take within the Eero app that require a complete restart of the network to take effect.  (Enabling or disabling "Optimize for Conferencing and Gaming" for example.)

This will immediately take down the network for about five minutes with no warning given to the user.

This means that doing simple network maintenance can often result in unexpected downtime.  Kids are kicked out of online classes, parents are dropped from conference calls, TV streams stop, etc.

If a reboot is required for any reason, the app should first say something like "Doing this will restart your Eero network immediately.  Are you sure?"