History WebUI: add space at beginning of sidebar link so outline is fully visible

Bug: 945793
Change-Id: If766a68f71ce7d9d1068cc30b12a2c1191a966af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1540066Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644567}

chrome/browser/resources/history/side_bar.html

@@ -58,7 +58,7 @@
         cursor: pointer;
         display: flex;
         font-weight: 500;
-        margin-inline-end: 4px;
+        margin: 0 4px;
         min-height: 40px;
         padding-inline-start: 24px;
         position: relative;