Display full username in tooltip on search and autosuggest #7478 (#7920)

app/javascript/mastodon/features/compose/components/autosuggest_account.js

@@ -14,7 +14,7 @@ export default class AutosuggestAccount extends ImmutablePureComponent {
     const { account } = this.props;
 
     return (
-      <div className='autosuggest-account'>
+      <div className='autosuggest-account' title={account.get('acct')}>
         <div className='autosuggest-account-icon'><Avatar account={account} size={18} /></div>
         <DisplayName account={account} />
       </div>