Fixes margin issue for horizontal and fluid layouts with fixed navbar

Author: pchemguy

sqlpage/templates/shell.handlebars

@@ -130,7 +130,7 @@
         </nav>
         </header>
     {{/if}}
-    <main class="page-wrapper container-xl pt-3 px-md-5 px-sm-3 {{#if fixed_top_menu}} mt-5{{/if}}" id="sqlpage_main_wrapper">
+    <main class="page-wrapper container-xl pt-3 px-md-5 px-sm-3 {{#if fixed_top_menu}} mt-5{{#unless (eq layout 'boxed')}} pt-5{{/unless}}{{/if}}" id="sqlpage_main_wrapper">
         {{~#each_row~}}{{~/each_row~}}
     </main>
 </div>