Hide address received/sent from address page when using electrum API.

fixes #294

backend/src/api/bitcoin/electrum-api.ts

@@ -86,7 +86,8 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
           'spent_txo_count': 0,
           'spent_txo_sum': balance.unconfirmed < 0 ? -balance.unconfirmed : 0,
           'tx_count': unconfirmed,
-        }
+        },
+        'electrum': true,
       };
     } catch (e) {
       if (e === 'failed to get confirmed status') {

backend/src/api/bitcoin/esplora-api.interface.ts

@@ -91,6 +91,7 @@ export namespace IEsploraApi {
     address: string;
     chain_stats: ChainStats;
     mempool_stats: MempoolStats;
+    electrum?: boolean;
   }
 
   export interface ChainStats {