fix(list): allow overriding list-item padding for clickable items

Fixes #10384

Author: Splaktar

src/components/list/list.scss

@@ -143,7 +143,7 @@ md-list-item {
       align-items: center;
       justify-content: flex-start;
 
-      padding: 0 16px;
+      padding: $list-item-padding-vertical $list-item-padding-horizontal;
       margin: 0;
 
       font-weight: 400;