Sync Hosts when blink becomes active.

Blink currently only does a sync when you open the config dialog, this means when you make a change on one device you have to remember to open config on your other devices to sync the changes.

I forget all the time and then wonder why a new host or an edited host doesn’t connect.

I propose that whenever blink becomes active (I.e foreground) that it does a sync, maybe a little status like the one that appears on a lost connection temporarily appears to show that blink is syncing.

This would make blink a lot slicker.

Start by tracing the existing sync triggered when the config dialog opens, then identify the app foreground/active lifecycle entry point. Done means an active Blink automatically syncs host changes, and a temporary status indicates that syncing is in progress.

Written by the indexing model from the issue text.