Overhaul Sync + Status to be ✨ Delightful ✨

[DanGould]

It's front & center UX. We can make onboarding easier and the experience more delightful.

• make people know it's synchronizing 🧯 privately in UI
• Don't show synced only if FiltersLeft == 0 cause that's the default state for the int. Connection & filters DL'd & processed
• "[Privately] Sync'd to " based on most recently processed filter, not just downloaded. Filters have unixtime
• $ 11.6 Include update checker #62 include update checker UI i.e. if backend hardforks tell user to update in UI
• collapse vertically. It's 5 lines right now :O. Perhaps only display the sync item that ought to happen yet (Tor starting -> Backend connected -> Synced to x [height] -> full node unreachable -> seeking Bitcoin peers -> [show nothing if everything is connected]
• Integrate full node connection status if it's behaving unexpectedly Connect Full Node UI #217
• Sync from wallet creation height Sync new wallet from server block height #159 sync from recent height on new wallet #196 Feat/sync new from now (subrepo) #232
• Update the status on background. I think this can be done by making the status component transient. Right now it's a singleton and when you resume from the background it says connected cause it doesn't receive any update events in the background and the most recent event was being connected
• Get tor status (& progress) from TorManager instead of through Synchronizer pipeline
• Don't "process filters" from 0 every time the wallet opens. That messes the balance up and scares folks. Right now we cache Balance in the UiConfig & UI until this processing is done but still occasionally have problems

[DanGould]

JoinMarket-Org/joinmarket#653 (comment)