CLDR-18355 site: css: add margin to sidebar to prevent collisions (#4423)

Author: srl295

docs/site/assets/css/page.css

@@ -795,7 +795,10 @@ body.page .subpages a.hasChildren:after {
   color: black;
   top: 0.5em;
   left: 0.5em;
-  margin: 0em;
+  margin-top: 0em;
+  margin-right: 0em;
+  margin-left: 0.5em;
+  margin-bottom: 0.5em;
   padding: 0.3em;
   max-width: 30%;
   border: 1pt solid #99f;