l10n: Updates to Polish (pl) translation
l10n: Updates to Polish (pl) translation

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glowka/django-admin-tools,miurahr/django-admin-tools,miurahr/django-admin-tools,eternalfame/django-admin-tools,glowka/django-admin-tools,eternalfame/django-admin-tools,glowka/django-admin-tools,eternalfame/django-admin-tools,django-admin-tools/django-admin-tools,miurahr/django-admin-tools,django-admin-tools/django-admin-tools,miurahr/django-admin-tools,django-admin-tools/django-admin-tools