[Glitch] Improve polls: option lengths & redesign

Port 37b3985bfa to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/features/compose/components/poll_form.js

@@ -62,7 +62,7 @@ class Option extends React.PureComponent {
 
     return (
       <li>
-        <label className='poll__text editable'>
+        <label className='poll__option editable'>
           <span className={classNames('poll__input', { checkbox: isPollMultiple })} />
 
           <AutosuggestInput