trigger reading status modals from move button

- unhide reading status shelves
- trigger modals when moving to a read status shelf
- force page refresh when using move button

bookwyrm/templates/snippets/reading_modals/start_reading_modal.html

@@ -11,6 +11,7 @@ Start "<em>{{ book_title }}</em>"
 {% block modal-form-open %}
 <form name="start-reading" action="{% url 'reading-status' 'start' book.id %}" method="post" class="submit-status">
 <input type="hidden" name="reading_status" value="reading">
+<input type="hidden" name="shelf" value="{{ move_from }}"> 
 {% csrf_token %}
 {% endblock %}