Print Preview: Making the UI not block when preview is generated

chrome/browser/resources/print_preview.css

 html {
   height: 100%;
 }
 
 body {
   background: white;
   display: -webkit-box;
   height: 100%;
   margin: 0;
   overflow: hidden;
@@ skipping 588 matching lines @@
 }
 
 #print-summary {
   display: block;
   min-height: 30px;
 }
 
 #collate-option {
  -webkit-transition: opacity 200ms, -webkit-transform 200ms;
  -webkit-padding-start: 5px;
- display: inline-block;
  opacity: 1;
 }
 
 #collate-option[hidden] {
  -webkit-transition: opacity 100ms, -webkit-transform 100ms;
  opacity: 0;
 }
 
 body,
 button,
@@ skipping 102 matching lines @@
   -webkit-animation-delay: 300ms;
 }
 
 #two-sided-div {
   margin-top: 10px;
 }
 
 input[disabled] + label {
   color: gray;
 }