Fix various minor issues (#545)

* Add absolute URL to power tests

* Update to target Python 3.10

* Return user to current page when clicking 'mark reviewed'

* Add units to power test record detail and form

I'm a bad scientist (coz I'm an engineer)

* Allow a higher value in PSSC fields

* Default venue to event venue in EC/PT

* Fix population of initial venue values for EC/PT

* Add link to create power test from EC detail

* Do not set power plan field to required on RA

"This might be a problem if the risk assessment is being done by one person and the power plan by another."

* Default power MIC to MIC

* Implement some suggestions from the Doctor

* Prevent checking in to cancelled events and dry hires

Will close #539

* Exclude dry hires from H&S overview list

* Add "ex VAT" tooltips to asset purchase price and replacement cost

* Automagically clear and focus ID field when audit modal closes

Closes #533

* Delete unused things

* Allow two decimal places in cable length, show training item IDs in selectpicker

Will close #540

* Fix #524 500 Error when viewing qualification list for items nobody is qualified in

* Update README.md

* Add a guard against nulls in recent changes

Maybe fixes #537 I'm unable to replicate locally

* Turn down verbosity of CI tests, fix tests, potential speedup

* Squash migration

* Add encoding to open

* Update to v3 upload-artifact

Resolves a deprecation warning

RIGS/templates/hs/event_checklist_detail.html

@@ -9,6 +9,8 @@
     <div class="col-12 text-right my-3">
         {% button 'edit' url='ec_edit' pk=object.pk %}
         {% button 'view' url='event_detail' pk=object.event.pk text="Event" %}
+        <a href="{% url 'event_pt' object.event.pk %}" class="btn btn-info"><span class="fas fa-paperclip"></span> <span
+        class="hidden-xs">Create Power Test</span></a>
         {% include 'partials/review_status.html' with perm=perms.RIGS.review_eventchecklist review='ec_review' %}
     </div>
 </div>
@@ -71,6 +73,8 @@
 <div class="col-12 text-right">
 {% button 'edit' url='ec_edit' pk=object.pk %}
 {% button 'view' url='event_detail' pk=object.pk text="Event" %}
+<a href="{% url 'event_pt' object.event.pk %}" class="btn btn-info"><span class="fas fa-paperclip"></span> <span
+        class="hidden-xs">Create Power Test</span></a>
 {% include 'partials/review_status.html' with perm=perms.RIGS.review_eventchecklist review='ec_review' %}
 </div>
 <div class="col-12 text-right">