Polls: Hide multiple options hint if already voted

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

app/soapbox/components/polls/poll.tsx

@@ -67,13 +67,13 @@ const Poll: React.FC<IPoll> = ({ id, status }): JSX.Element | null => {
   return (
     // eslint-disable-next-line jsx-a11y/no-static-element-interactions
     <div onClick={e => e.stopPropagation()}>
-      {poll.multiple && (
+      {!showResults && poll.multiple && (
         <Text theme='muted' size='sm'>
           {intl.formatMessage(messages.multiple)}
         </Text>
       )}
 
-      <Stack space={4} className={classNames('mt-4')}>
+      <Stack space={4} className='mt-4'>
         <Stack space={2}>
           {poll.options.map((option, i) => (
             <PollOption