[PoC] Add resync button

[Szpoti]

(Messed up my master branch in the last PR)

Fixes #2005

Now the user can press the Resync button under Wallet Settings -> Tools.
It will open a dialog, and if OK is pressed, the Height and TurboSyncHeight will be set to 0, and the wallet will shut down.

Calling ForceTerminate is needed because the open dialog won't let Wasabi to terminate the simple way.
This means that if coinjoin is in critical state, we will terminate whatsoever. This should be changed.

[turbolay]

Few notes on a Resync Button, not on the implementation:

• Currently, the resync flow is really really wrong, because it tests an unnecessary number of keys. Fixing this was the point of WIP: Don't test more that MinGapLimit clean keys #12668 but this concept is parked until Clean the Label Chaos #12730, reason being that it's impossible (at least for my skills) to implement this concept without affecting the normal flow. Only way would be to stop relying on the stored state of the KeyManager, but currently it loads the state because of the labels. So by changing how the labels are loaded, we can remove easily the loading of HdPubKey state in the KeyManager. This is the reason why the resync button shouldn't be prioritized, but it's not a reason not to have it anyway.
• An UI resync workflow must have at least a text box to select the starting Height. At best, we could have a slider for the estimated date of the starting block something like "resync the last 10 days", because resyncing to 0 is almost all the time useless
• It would be great in the resync workflow to include a text box to change the MinGapLimit. We discussed it yesterday during a RR and it would probably be the best place to put such settings, reason being that it's directly linked to resync.

[yahiheb]

cACK

Just few additional notes and nits:

• I think the resync button should restart Wasabi when used instead of only shutting it down and then the user has to start it manually.
• Also we should have some separation between the tools. With this it looks like Resync button is part of the recovery wallet verification.
  

[yahiheb]

To match the text:

Suggested change

	EnableNext="True" NextContent="Save"
	EnableNext="True" NextContent="OK"

[yahiheb]

Suggested change

	<TextBlock Text="If your funds are missing, you can resynchronize wallet. Once you restart Wasabi, it can take several hours to rescan and find all your funds." />
	<TextBlock Text="If your funds are missing, you can resynchronize your wallet." />

[yahiheb]

that can take some time depending on the size of your wallet (how many transactions it had)

Suggested change

	<TextBlock Text="Rescanning the wallet could take several hours, based on how many transactions your wallet had." />
	<TextBlock Text="Rescanning the wallet could take some time depending mainly on its size (Number of transactions)." />