harden: key remembered site permissions by full origin (closes #402)

allowedSites and deniedSites held the bare hostname, so a grant to
https://dapp.example also authorised http://dapp.example and every port
on that host, and the connection, transaction and signature prompts
named only the hostname. Both lists now store and match the full origin
(scheme://host[:port]), the key the connections approved without
Remember already used. The prompts, the Settings site lists and
AUTISTMASK_REMOVE_SITE use the origin too. Entries saved by hostname
are not migrated (pre-1.0): they match no site.

Model: opus-5-5

tests/stateRecovery.test.js

@@ -167,7 +167,9 @@ describe("an unversioned profile that is perfectly valid", () => {
         expect(stored.wallets[0].encryptedSecret).toBe("encrypted-secret-1");
         expect(stored.wallets[0].addresses[0].address).toBe(ADDRESS);
         expect(stored.activeAddress).toBe(ADDRESS);
-        expect(stored.allowedSites).toEqual({ [ADDRESS]: ["dapp.example"] });
+        expect(stored.allowedSites).toEqual({
+            [ADDRESS]: ["https://dapp.example"],
+        });
     });
 });