power.html: Reboot: Redirect to Home first after LB was offline
power.html: Reboot: Redirect to Home first after LB was offline

- Redirect to / only if LB was offline for at least one request.
Fixes #1033

mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry