MD downloads: incorporate UX sync feedback

chrome/browser/resources/md_downloads/item.css

 /* Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 :host {
   @apply(--downloads-shared-style);
   display: flex;
   margin: 32px 0;
 }
 
@@ skipping 14 matching lines @@
 
 :host([hide-date]) #date-container {
   visibility: hidden;
 }
 
 #content {
   background: white;
   border-radius: 2px;  /* TODO(dbeam): why does this differ from Polymer? */
   display: flex;
   flex: none;
+  min-height: 96px;
   width: var(--downloads-item-width);
 }
 
 #content.no-file {
   background: rgba(255, 255, 255, .5);
 }
 
 .no-file .icon-wrapper:not(#remove-wrapper),
 .no-file #details {
   opacity: .5;
@@ skipping 136 matching lines @@
   #content {
     margin: 0 auto;
   }
 
   #date-container {
     flex: none !important;
     margin: 0 auto 32px;
     width: var(--downloads-item-width);
   }
 }