Feature request: Add admin for softdeleted items.

[jorgii]

Add a SoftDeleteAdmin class that lists even soft deleted items. That could be useful to people that need to restore soft deleted items via the admin panel.

The code should be pretty simple:

from django.contrib import admin

class SoftDeleteAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        qs = self.model.raw_objects.get_queryset()
        ordering = self.get_ordering(request)
        if ordering:
            qs = qs.order_by(*ordering)
        return qs