Make dialog header 56px tall with 48px action bar for files-ng

Bug: 992823
Change-Id: Id4c2453cce71d969b92d19ec78f1f28d6424e5eb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2045280
Commit-Queue: Alex Danilo <adanilo@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740522}

ui/file_manager/file_manager/foreground/css/file_manager.css

@@ -432,6 +432,7 @@ div.splitter {
   background: none;
   border-bottom: 1px solid var(--cr-separator-color, rgb(224, 224, 224));
   color: var(--google-grey-700);
+  height: 56px;
 }
 
 body.check-select .dialog-header {
@@ -2057,6 +2058,11 @@ cr-menu-item[command='#install-new-extension'] .icon.start {
   flex: none;
 }
 
+.dialog-header.files-ng #action-bar {
+  align-items: center;
+  height: 48px;
+}
+
 .detail-name > * {
   align-items: center;
   display: flex;