🐛 Fixed various iOS issues (#868)

closes TryGhost/Ghost#8962
- fix inability to close menu after clicking "more" in mobile quick-nav (credit @nithindavid)
- fix stories list header padding at iPhone 6S sizes
- fix horizontal scroll when menu is open

ghost/admin/app/styles/layouts/content.css

@@ -163,12 +163,6 @@
     color: var(--darkgrey);
 }
 
-@media (max-width: 400px) {
-    .gh-posts-list-item a {
-        padding: 15px;
-    }
-}
-
 @media (max-width: 900px) {
     .gh-posts-list-item a {
         padding-right: 40px;

ghost/admin/app/styles/layouts/main.css

@@ -314,6 +314,8 @@ body > .ember-view:not(.default-liquid-destination) {
         transform: translate3d(0,0,0);
     }
     .mobile-menu-expanded .content-cover {
+        width: 20vw;
+        cursor: pointer;
         transform: translate3d(80vw, 0, 0);
     }