Don't set inner HTML for text email content.

It was a bad copy-paste from the HTML display.

src/EmailContentText.tsx

@@ -15,20 +15,13 @@ const EmailContentText: React.FC<EmailContentTextProps> = (props) => {
 	}
 	return (
 		<Stack>
-			<pre>
+			{email.textBody.map((t) =>
-				{email.textBody.map((t) =>
+				t.partId === undefined ? (
-					t.partId === undefined ? (
+					<pre>undefined partId</pre>
-						<Placeholder />
+				) : (
-					) : (
+					<pre key={t.partId}>{email.bodyValues![t.partId].value}</pre>
-						<div
+				),
-							key={t.partId}
+			)}
-							dangerouslySetInnerHTML={{
-								__html: email.bodyValues![t.partId].value,
-							}}
-						/>
-					),
-				)}
-			</pre>
 		</Stack>
 	);
 };