placeholder in account when no assemblies/job

src/InSillyCloWeb/pre_basetheme_bootstrap/templates/registration/account.html

@@ -47,20 +47,36 @@
 <div class="col-12 col-lg-10">
     <div class="tab-content" id="v-pills-tabContent">
         <div class="tab-pane fade show active" id="v-pills-job" role="tabpanel" aria-labelledby="v-pills-job-tab">
-            <div class="row">
+            <div class="row context-simulator">
             {% for object in request|get_simulation_jobs %}
                 <div class="col-12 mb-4">
                     {% include 'assemblies/simulatorjob_card.html' with object=object%}
                 </div>
+                {%empty%}
+                <div class="col-12 mb-4">
+                    <div class="card border-auto">
+                        <div class="card-body">
+                            <h3 class="mt-4">{%trans "No simulation yet"%}</h3>
+                        </div>
+                    </div>
+                </div>
             {%endfor%}
             </div>
         </div>
         <div class="tab-pane fade " id="v-pills-assemblies" role="tabpanel" aria-labelledby="v-pills-assemblies-tab">
-            <div class="row">
+            <div class="row context-designer">
             {% for object in request|get_assemblies %}
                 <div class="col-12 mb-4">
                     {% include 'assemblies/assembly_card.html' with object=object show_edit=True%}
                 </div>
+                {%empty%}
+                <div class="col-12 mb-4">
+                    <div class="card border-auto">
+                        <div class="card-body">
+                            <h3 class="mt-4">{%trans "No custom assemblies yet"%}</h3>
+                        </div>
+                    </div>
+                </div>
             {%endfor%}
             </div>
         </div>