fix header sessions message section

_locales/en/messages.json

@@ -774,7 +774,7 @@
     "description": "Shown to separate the types of search results"
   },
   "messagesHeader": {
-    "message": "Sessions",
+    "message": "Session",
     "description": "Shown to separate the types of search results"
   },
   "settingsHeader": {
@@ -1148,6 +1148,11 @@
     "description":
       "Shown on the drop-down menu for an individual message, deletes single message"
   },
+  "messages": {
+    "message": "Messages",
+    "description":
+      "Message search result"
+  },
   "deleteMessages": {
     "message": "Delete Messages",
     "description": "Menu item for deleting messages, title case."

ts/components/SearchResults.tsx

@@ -79,7 +79,7 @@ export class SearchResults extends React.Component<Props> {
           <div className="module-search-results__messages">
             {hideMessagesHeader ? null : (
               <div className="module-search-results__messages-header">
-                {i18n('messagesHeader')}
+                {i18n('messages')}
               </div>
             )}
             {messages.map(message => (