[Glitch] Fix dropdown menu on profiles not being accessible on narrow screens in web UI

Port 6da9df774e to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/account/components/header.js

@@ -317,8 +317,6 @@ class Header extends ImmutablePureComponent {
               <Avatar account={suspended || hidden ? undefined : account} size={90} />
             </a>
 
-            <div className='spacer' />
-
             {!suspended && (
               <div className='account__header__tabs__buttons'>
                 {!hidden && (