[FIX] website_slides: display bug after submitting quiz

After submitting the quiz, buttons and validation content was rendering  on top
of the quiz instead of under it. This display bug is fixed in this commit.

Task-2072564

closes odoo/odoo#37040

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/website_slides/static/src/xml/slide_quiz.xml

@@ -3,9 +3,6 @@
     <t t-name="slide.slide.quiz">
         <div class="o_wslides_fs_quiz_container o_wslides_wrap h-100 w-100 overflow-auto pb-5">
             <div class="container">
-                <div t-if="widget.slide.completed" class="row">
-                    <div class="o_wslides_js_lesson_quiz_validation col py-2 bg-100 mb-2 border-bottom"/>
-                </div>
 
                 <div t-foreach="widget.quiz.questions" t-as="question"
                      t-attf-class="o_wslides_js_lesson_quiz_question mt-3 mb-4 #{widget.readonly ? 'disabled' : ''} #{widget.slide.completed ? 'completed-disabled' : ''}"
@@ -40,6 +37,9 @@
                     </button>
                 </div>
                 <div t-if="!widget.slide.completed" class="o_wslides_js_lesson_quiz_validation border-top pt-3"/>
+                <div t-else="" class="row">
+                    <div class="o_wslides_js_lesson_quiz_validation col py-2 bg-100 mb-2 border-bottom"/>
+                </div>
             </div>
         </div>
     </t>