[FIX] web: keep nocontent tooltip in center

Before this commit: nocontent tooltip was not diplayed in center

After this commit: nocontent tooltip will be displayed in center,
toggle o_list_view class which should not be added if nocontent
help is displayed, as there is no listview to display so remove
o_list_view class

task-2008371

closes odoo/odoo#34178

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

addons/web/static/src/js/views/list/list_renderer.js

@@ -34,7 +34,6 @@ var FIELD_CLASSES = {
 };
 
 var ListRenderer = BasicRenderer.extend({
-    className: 'o_list_view',
     events: {
         "mousedown": "_onMouseDown",
         "click .o_optional_columns_dropdown .dropdown-item": "_onToggleOptionalColumn",
@@ -894,6 +893,7 @@ var ListRenderer = BasicRenderer.extend({
 
         // display the no content helper if there is no data to display
         var displayNoContentHelper = !this._hasContent() && !!this.noContentHelp;
+        this.$el.toggleClass('o_list_view', !displayNoContentHelper);
         if (displayNoContentHelper) {
             // destroy the previously instantiated pagers, if any
             _.invoke(oldPagers, 'destroy');