restrict app width on very wide monitors

css/base.css

@@ -2924,6 +2924,15 @@ ul.tabbar li.active > a {
   color: #666C;
 }
 
+/*
+ Very wide monitor.
+ */
+@media (min-width: 1440px){
+  #app-container {
+    max-width: 114rem;
+  }
+}
+
 /*
  Mobile styles.
  */