Use plaintext value for field value tooltips in web UI (#7388)

Fix #7383

app/javascript/mastodon/features/account/components/header.js

@@ -146,7 +146,7 @@ export default class Header extends ImmutablePureComponent {
               {fields.map((pair, i) => (
                 <dl key={i}>
                   <dt dangerouslySetInnerHTML={{ __html: pair.get('name_emojified') }} title={pair.get('name')} />
-                  <dd dangerouslySetInnerHTML={{ __html: pair.get('value_emojified') }} title={pair.get('value')} />
+                  <dd dangerouslySetInnerHTML={{ __html: pair.get('value_emojified') }} title={pair.get('value_plain')} />
                 </dl>
               ))}
             </div>