Watch dir instead of json file.

Adding divider to network dropdown.

backend/mempool-config.sample.json

@@ -14,7 +14,7 @@
   "TX_PER_SECOND_SPAN_SECONDS": 150,
   "ELECTRS_API_URL": "https://www.blockstream.info/testnet/api",
   "BISQ_ENABLED": false,
-  "BSQ_BLOCKS_DATA_PATH": "/bisq/data/all/blocks.json",
+  "BSQ_BLOCKS_DATA_PATH": "/bisq/data/all/",
   "SSL": false,
   "SSL_CERT_FILE_PATH": "/etc/letsencrypt/live/mysite/fullchain.pem",
   "SSL_KEY_FILE_PATH": "/etc/letsencrypt/live/mysite/privkey.pem"