Since nova doesn't permit renaming the default dashboard 'main' to something else, I've modified the controller to only show the name of the dashboard if their is multiple dashboards in the project.
NovaBreadcrumbsController.php line 65
if (count(Nova::availableDashboards($request)) >= 1) {
$this->appendToCrumbs(__(Str::title($request->get('name'))), $pathParts->slice(0, 3)->implode('/'));
}
Since nova doesn't permit renaming the default dashboard 'main' to something else, I've modified the controller to only show the name of the dashboard if their is multiple dashboards in the project.
NovaBreadcrumbsController.php line 65