Serde fallback icon: Add a tooltip
Implement a tooltip saying it's a fallback serde
<img width="701" alt="image" src="https://user-images.githubusercontent.com/1494347/234539665-1d2a1ecc-d39c-4812-8307-f1b5e5cd1570.png">

kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx
kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx
diff --git a/kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx b/kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx
index dd5cfae7488..af76db6739f 100644
--- a/kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx
+++ b/kafka-ui-react-app/src/components/Topics/Topic/Messages/Message.tsx
@@ -8,6 +8,7 @@ import { formatTimestamp } from 'lib/dateTimeHelpers';
 import { JSONPath } from 'jsonpath-plus';
 import Ellipsis from 'components/common/Ellipsis/Ellipsis';
 import WarningRedIcon from 'components/common/Icons/WarningRedIcon';
+import Tooltip from 'components/common/Tooltip/Tooltip';
 
 import MessageContent from './MessageContent/MessageContent';
 import * as S from './MessageContent/MessageContent.styled';
@@ -110,14 +111,26 @@ const Message: React.FC<Props> = ({
         </td>
         <S.DataCell title={key}>
           <Ellipsis text={renderFilteredJson(key, keyFilters)}>
-            {keySerde === 'Fallback' && <WarningRedIcon />}
+            {keySerde === 'Fallback' && (
+              <Tooltip
+                value={<WarningRedIcon />}
+                content="Fallback serde was used"
+                placement="left"
+              />
+            )}
           </Ellipsis>
         </S.DataCell>
         <S.DataCell title={content}>
           <S.Metadata>
             <S.MetadataValue>
               <Ellipsis text={renderFilteredJson(content, contentFilters)}>
-                {valueSerde === 'Fallback' && <WarningRedIcon />}
+                {valueSerde === 'Fallback' && (
+                  <Tooltip
+                    value={<WarningRedIcon />}
+                    content="Fallback serde was used"
+                    placement="left"
+                  />
+                )}
               </Ellipsis>
             </S.MetadataValue>
           </S.Metadata>
