tooltip for reorg blocks

ui/blocks/BlocksTableItem.tsx

@@ -28,12 +28,14 @@ const BlocksTableItem = ({ data, isPending }: Props) => {
       <Td fontSize="sm">
         <Flex columnGap={ 2 } alignItems="center">
           { isPending && <Spinner size="sm" color="blue.500" emptyColor={ spinnerEmptyColor } flexShrink={ 0 }/> }
+          <Tooltip isDisabled={ data.type !== 'reorg' } label="Chain reorganizations">
             <Link
               fontWeight={ 600 }
               href={ link('block_index', { id: String(data.height) }) }
             >
               { data.height }
             </Link>
+          </Tooltip>
         </Flex>
         <Text variant="secondary" mt={ 2 } fontWeight={ 400 }>{ dayjs(data.timestamp).fromNow() }</Text>
       </Td>