move default action css classes from template to action so it can be modified

Author: MartinCervenkaSB

src/django_smartbase_admin/engine/actions.py

@@ -60,7 +60,7 @@ def __init__(
         self.view = view
         self.action_id = action_id
         self.action_modifier = action_modifier
-        self.css_class = css_class
+        self.css_class = css_class or "btn btn-empty"
         self.no_params = no_params
         self.open_in_modal = open_in_modal
         self.group = group

src/django_smartbase_admin/templates/sb_admin/actions/change_form.html

@@ -99,7 +99,7 @@ <h1 class="text-24 md:text-30 text-dark-900 font-bold font-heading line-clamp-1
                             {% if detail_actions %}
                                 {% for action in detail_actions %}
                                     <li class="max-sm:hidden">
-                                        <a {% if action.open_in_modal %}{% include 'sb_admin/actions/partials/open_modal_attrs.html' %}{% endif %} href="{{ action.url }}" class="btn {{ action.css_class|default_if_none:'' }}">
+                                        <a {% if action.open_in_modal %}{% include 'sb_admin/actions/partials/open_modal_attrs.html' %}{% endif %} href="{{ action.url }}" class="{{ action.css_class|default_if_none:'' }}">
                                             {% if action.icon %}
                                                 <svg class="w-16 h-16 mr-8">
                                                     <use href="#{{ action.icon }}"></use>

src/django_smartbase_admin/templates/sb_admin/actions/list.html

@@ -77,7 +77,7 @@ <h1 class="text-24 md:text-30 text-dark-900 font-bold font-heading line-clamp-1
                             </div>
                         {% else %}
                             <li class="max-sm:hidden">
-                                {% include list_action.template with action=list_action view_id=view_id extra_classes="btn btn-empty" %}
+                                {% include list_action.template with action=list_action view_id=view_id %}
                             </li>
                         {% endif %}
                     {% endfor %}