MDL-31169 theme_base: adds clearfix to page layouts so body height is not zero

theme/base/layout/frontpage.php

@@ -90,6 +90,7 @@ echo $OUTPUT->doctype() ?>
         echo $OUTPUT->standard_footer_html();
         ?>
     </div>
+    <div class="clearfix"></div>
 </div>
 <?php echo $OUTPUT->standard_end_of_body_html() ?>
 </body>

theme/base/layout/general.php

@@ -103,6 +103,7 @@ echo $OUTPUT->doctype() ?>
         ?>
     </div>
     <?php } ?>
+    <div class="clearfix"></div>
 </div>
 <?php echo $OUTPUT->standard_end_of_body_html() ?>
 </body>

theme/base/layout/report.php

@@ -83,6 +83,7 @@ echo $OUTPUT->doctype() ?>
         ?>
     </div>
     <?php } ?>
+    <div class="clearfix"></div>
 </div>
 <?php echo $OUTPUT->standard_end_of_body_html() ?>
 </body>