[REFACTOR] edit navbar code

administration/templates/edit_kontributor.html

administration/templates/kelola_admin.html

administration/templates/registrasi_admin.html

administration/views.py

app/admin.py

app/forms.py

app/migrations/0028_adminnotification.py

app/migrations/0028_notifikasikontributor.py

app/migrations/0029_guestbook.py

app/migrations/0029_merge_20201101_0217.py

app/migrations/0030_merge_20201101_0621.py

app/migrations/0031_merge_20201101_1729.py

app/models.py

app/services.py

app/static/app/css/guest_book.css

app/templates/app/base_admin.html

app/templates/app/base_dashboard.html

app/templates/app/base_profile.html

app/templates/app/detail_materi.html

app/templates/app/includes/navbar_katalog_materi.html