Merge pull request #3065 from 138138138/master

Fix iOS 3 buttons separated lines

assets/css/default.css

@@ -291,7 +291,7 @@ input[type="search"]::-webkit-search-cancel-button {
 
 .flexible { display: flex; }
 .flex-left  { flex: 1 1 100%; flex-wrap: wrap;   }
-.flex-right { flex: 1 0 max-content; flex-wrap: nowrap; }
+.flex-right { flex: 1 0 auto; flex-wrap: nowrap; }
 
 p.channel-name { margin: 0; }
 p.video-data   { margin: 0; font-weight: bold; font-size: 80%; }