Flip Cake nodes out of the default slot in node YAMLs

Cake's nodes are kept in the available list (their public infra is fine,
and users may want to opt in) but no longer the freshest-install default
for XMR, BTC, or LTC.

XMR: node.sethforprivacy.com:443 (matches newCakeWalletMoneroUri migration
target, so existing users and fresh installs converge on the same node).
BTC: electrum.blockstream.info:50002 (matches newCakeWalletBitcoinUri).
LTC: electrum-ltc.bysh.me:50002 (matches cakeWalletLitecoinElectrumUri).

assets/bitcoin_electrum_server_list.yml

@@ -1,7 +1,12 @@
+-
+  uri: electrum.blockstream.info:50002
+  useSSL: true
+  isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: btc-electrum.cakewallet.com:50002
   useSSL: true
-  isDefault: true
+  isDefault: false
   isEnabledForAutoSwitching: true
 -
   uri: electrs.cakewallet.com:50001
@@ -17,10 +22,6 @@
   uri: bitcoin.stackwallet.com:50002
   useSSL: true
   isEnabledForAutoSwitching: true
--
-  uri: electrum.blockstream.info:50002
-  useSSL: true
-  isEnabledForAutoSwitching: true
 -
   uri: electrum.emzy.de:50002
   useSSL: true

assets/litecoin_electrum_server_list.yml

@@ -1,15 +1,17 @@
+-
+  uri: electrum-ltc.bysh.me:50002
+  useSSL: true
+  isDefault: true
+  isEnabledForAutoSwitching: true
 -
   uri: ltc-electrum.cakewallet.com:50002
   useSSL: true
-  isDefault: true
+  isDefault: false
   isEnabledForAutoSwitching: true
 -
   uri: litecoin.stackwallet.com:20063
   useSSL: true
   isEnabledForAutoSwitching: true
--
-  uri: electrum-ltc.bysh.me:50002
-  useSSL: true
 -
   uri: lightweight.fiatfaucet.com:50002
   useSSL: true

assets/node_list.yml

@@ -1,17 +1,17 @@
+-
+  uri: node.sethforprivacy.com:443
+  is_default: true
+  useSSL: true
+  isEnabledForAutoSwitching: true
 -
   uri: xmr-node.cakewallet.com:18081
-  is_default: true
+  is_default: false
   trusted: true
   useSSL: true
   isEnabledForAutoSwitching: true
 -
   uri: cakexmrl7bonq7ovjka5kuwuyd3f7qnkz6z6s6dmsy3uckwra7bvggyd.onion:18081
   is_default: false
--
-  uri: node.sethforprivacy.com:443
-  useSSL: true
-  is_default: false
-  isEnabledForAutoSwitching: true
 -
   uri: node.monerodevs.org:18089
   useSSL: true