Add event checkin functionality, seperate power tests into a different form (#536)

* Split power related parts of event checklist into a seperate form

* Revamp H&S overview, remove individual lists.

They were not a good thing.

* Remove old 'vehicle/crew' stuff

* Very initial version of checkin form

* Further work on checkin, add role field etc

* Fix tests after form split

* Add ability to edit checkins, more validation

* Basic checkin/out logic complete

* Add homepage checkin for events happening now

* Minor improvement to homepage UI

* Checkin button turns into checkout button where applicable

* UI work

* Clicking check out does not redirect the user

* Register check in model with the admin site

* Add power record status chip, checklist status chip displays number of checklists

* Minor fixes

* Implement codedoctor suggestions

* pep8

* Add data migration for crew/vehicles

* Checkin only requires login (no perms) and block users from editing other checkins at Django level

RIGS/templates/hs/hs_list.html

@@ -12,6 +12,7 @@
                 <th scope="col">Dates</th>
                 <th scope="col">RA</th>
                 <th scope="col">Checklists</th>
+                <th scope="col">Power Records</th>
             </tr>
         </thead>
         <tbody>
@@ -35,6 +36,14 @@
             <a href="{% url 'event_ec' event.pk %}" class="btn btn-info"><span class="fas fa-paperclip"></span> <span
             class="d-none d-sm-inline">Create</span></a>
             </td>
+            <td>
+            {% for record in event.power_tests.all %}
+            {% include 'partials/hs_status.html' with event=event object=record view='pt_detail' edit='pt_edit' create='event_pt' review='pt_review' perm=perms.RIGS.review_power %}
+            <br/>
+            {% endfor %}
+            <a href="{% url 'event_pt' event.pk %}" class="btn btn-info"><span class="fas fa-paperclip"></span> <span
+            class="hidden-xs">Create</span></a>
+            </td>
         </tr>
         {% empty %}
         <tr class="bg-warning text-dark">