Admin user management (#1393)

part of #1022

    Allow updating the show_on_leaderboard field.
    Add raw JSON of the user object.
    Add a new user message table.
    Also fixed style issue: hard to see reaction count when the user also reacted.
    Rename MessageTable to MessageConversation.

website/src/components/Messages/MessageConversation.tsx

@@ -0,0 +1,24 @@
+import { Stack } from "@chakra-ui/react";
+import { MessageTableEntry } from "src/components/Messages/MessageTableEntry";
+import { Message } from "src/types/Conversation";
+
+interface MessageConversationProps {
+  messages: Message[];
+  enableLink?: boolean;
+  highlightLastMessage?: boolean;
+}
+
+export function MessageConversation({ messages, enableLink, highlightLastMessage }: MessageConversationProps) {
+  return (
+    <Stack spacing="4">
+      {messages.map((message, idx) => (
+        <MessageTableEntry
+          enabled={enableLink}
+          message={message}
+          key={message.id + message.frontend_message_id}
+          highlight={highlightLastMessage && idx === messages.length - 1}
+        />
+      ))}
+    </Stack>
+  );
+}