small fixes

ui/address/coinBalance/AddressCoinBalanceChart.tsx

@@ -19,6 +19,10 @@ const AddressCoinBalanceChart = ({ addressHash }: Props) => {
     value: BigNumber(value).div(10 ** appConfig.network.currency.decimals).toNumber(),
   })), [ data ]);
 
+  if (!items?.length) {
+    return null;
+  }
+
   return (
     <ChartWidget
       chartHeight="200px"

ui/tx/TxRawTrace.tsx

@@ -41,7 +41,7 @@ const TxRawTrace = () => {
   }
 
   if (data.length === 0) {
-    return <span>There is no raw trace for this transaction.</span>;
+    return <span>No trace entries found.</span>;
   }
 
   const text = JSON.stringify(data, undefined, 4);
@@ -56,6 +56,9 @@ const TxRawTrace = () => {
         minHeight="500px"
         p={ 4 }
         value={ text }
+        fontSize="sm"
+        borderRadius="md"
+        readOnly
       />
     </>
   );