minor fixes

ui/pages/Block.tsx

@@ -49,15 +49,18 @@ const BlockPageContent = () => {
   const hasPagination = !isMobile && router.query.tab === 'txs' && blockTxsQuery.isPaginationVisible;
 
   const referrer = isInBrowser ? window.document.referrer : appProps.referrer;
+  const hasGoBackLink = referrer && referrer.includes('/blocks');
 
   return (
     <Page>
       <Flex alignItems="center" columnGap={ 3 }>
+        { hasGoBackLink && (
           <Tooltip label="Back to blocks list">
             <Link mb={ 6 } display="inline-flex" href={ referrer }>
               <Icon as={ eastArrowIcon } boxSize={ 6 } transform="rotate(180deg)"/>
             </Link>
           </Tooltip>
+        ) }
         <PageTitle text={ `Block #${ router.query.id }` }/>
       </Flex>
       <RoutedTabs

ui/txs/TxsListItem.tsx

@@ -77,6 +77,7 @@ const TxsListItem = ({ tx, showBlockInfo, currentAddress }: Props) => {
           </Flex>
           <Text variant="secondary" fontWeight="400" fontSize="sm">{ dayjs(tx.timestamp).fromNow() }</Text>
         </Flex>
+        { tx.method && (
           <Flex mt={ 3 }>
             <Text as="span" whiteSpace="pre">Method </Text>
             <Text
@@ -89,6 +90,7 @@ const TxsListItem = ({ tx, showBlockInfo, currentAddress }: Props) => {
               { tx.method }
             </Text>
           </Flex>
+        ) }
         { showBlockInfo && tx.block !== null && (
           <Box mt={ 2 }>
             <Text as="span">Block </Text>