Hide save and add another button from edit.html if can_create is False (

#742)

sqladmin/templates/edit.html

@@ -43,10 +43,12 @@ <h3 class="card-title">Edit {{ model_view.name }}</h3>
             <div class="btn-group flex-wrap" data-toggle="buttons">
               <input type="submit" name="save" value="Save" class="btn">
               <input type="submit" name="save" value="Save and continue editing" class="btn">
-              {% if model_view.save_as %}
-              <input type="submit" name="save" value="Save as new" class="btn">
-              {% else %}
-              <input type="submit" name="save" value="Save and add another" class="btn">
+              {% if model_view.can_create %}
+                {% if model_view.save_as %}
+                <input type="submit" name="save" value="Save as new" class="btn">
+                {% else %}
+                <input type="submit" name="save" value="Save and add another" class="btn">
+                {% endif %}
               {% endif %}
             </div>
           </div>
@@ -55,4 +57,4 @@ <h3 class="card-title">Edit {{ model_view.name }}</h3>
     </div>
   </div>
 </div>
-{% endblock %}
+{% endblock %}