Print Preview: Increase sidebar width

Increase the width of the Print Preview sidebar by 25px, providing an
extra 25px for titles.

Bug: 925960, 941369
Change-Id: I59f216523709547312348d33104aa5e467a3f585
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574225Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652289}

chrome/browser/resources/print_preview/new/app.html

@@ -40,7 +40,7 @@
 
       print-preview-sidebar {
         flex: none;
-        width: 311px;
+        width: 326px;
       }
 
       #preview-area-container {

chrome/browser/resources/print_preview/new/settings_section.html

@@ -29,7 +29,7 @@
         flex: none;
         font-size: 1em;
         line-height: calc(20/13 * 1em);
-        width: 75px;
+        width: 100px;
       }
     </style>
     <slot name="title"></slot>

chrome/browser/resources/print_preview/print_preview_new.html

@@ -49,7 +49,7 @@
       content: '';
       display: block;
       height: 100%;
-      width: 311px;
+      width: 326px;
     }
 
     [new-print-preview-layout].loading body::before {