Increase the new block check interval from 20s to 60s.

src/js/ports.js

@@ -48,7 +48,7 @@ const PROVIDER_TYPE_SHOW_ACCOUNT = 3;
 
 const ACCOUNT_CHECK_INTERVAL_MS = 2000;
 const NETWORK_CHECK_INTERVAL_MS = 4000;
-const NEW_BLOCK_CHECK_INTERVAL_MS = 20_000;
+const NEW_BLOCK_CHECK_INTERVAL_MS = 60_000;
 const SECONDS_PER_BLOCK = 12;
 const BLOCKS_PER_DAY = new BN(7200); // 12 seconds per block
 const EXP_DECIMALS = 18;