Issue #1663042 by Rob Loach, barraponto, marknorris: Clean up css in Help.

core/modules/help/help-rtl.css

 
 .help-items {
   float: right;
-  padding-right: 0;
-  padding-left: 3%;
+  margin-right: 0;
+  margin-left: 3%;
 }
 .help-items-last {
-  padding-right: 0;
-  padding-left: 0;
+  margin-right: 0;
+  margin-left: 0;
 }

core/modules/help/help.css

@@ -2,8 +2,8 @@
 .help-items {
   float: left; /* LTR */
   width: 22%;
-  padding-right: 3%; /* LTR */
+  margin-right: 3%; /* LTR */
 }
 .help-items-last {
-  padding-right: 0; /* LTR */
+  margin-right: 0; /* LTR */
 }