fix(style): Remove extra class

website/public/css/header.styl

@@ -168,10 +168,5 @@ header .hero-stats
   width: 100%
 
 button.party-invite
-  right: 10px;
-  position: absolute;
-  top: 55px;
-
-button.party-invite-middle
   display: block
   margin: 57px auto

website/views/shared/header/header.jade

@@ -33,7 +33,6 @@
     .party(ng-controller='PartyCtrl')
       button.party-invite.btn.btn-primary(ng-click="inviteOrStartParty(group)",
         ng-if="(!party.members || party.memberCount === 1) && user.preferences.displayInviteToPartyWhenPartyIs1",
-        class="party-invite-middle",
         popover="{{!party.members ? env.t('startAParty') : env.t('addToParty')}}", popover-placement="left", popover-trigger="mouseenter")
         span=env.t("battleWithFriends")
       .herobox-wrap(ng-repeat='profile in partyMinusSelf')