MD History: Fix loading of history results in background tabs

chrome/browser/resources/md_history/app.vulcanized.html

Index: chrome/browser/resources/md_history/app.vulcanized.html
diff --git a/chrome/browser/resources/md_history/app.vulcanized.html b/chrome/browser/resources/md_history/app.vulcanized.html
index f2efdc18f4078ea8a53c31096a0dd4789a9ade28..09e4008573b2566c558e1b2687c9d1e211321174 100644
--- a/chrome/browser/resources/md_history/app.vulcanized.html
+++ b/chrome/browser/resources/md_history/app.vulcanized.html
@@ -2494,6 +2494,8 @@ paper-tabs {
 <style is="custom-style" css-build="shadow">html {
   --cr-actionable_-_cursor:  pointer;;
     --cr-focused-item-color: var(--google-grey-300);
+    
+    --cr-icon-padding: 8px;
     --cr-selectable-focus_-_background-color:  var(--cr-focused-item-color); --cr-selectable-focus_-_outline:  none;
     --cr-separator-line: 1px solid rgba(0, 0, 0, 0.06);
     --paper-checkbox-ink-size: 40px;