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

assets/templates/partials/purchasedetails_form.html

@@ -34,7 +34,7 @@
       <label for="{{ form.purchase_price.id_for_label }}">Purchase Price</label>
       <div class="input-group">
         <div class="input-group-prepend"><span class="input-group-text">£</span></div>
-        {% render_field form.purchase_price|add_class:'form-control' value=object.purchase_price %}
+        {% render_field form.purchase_price|add_class:'form-control'|set_data:"toggle:tooltip" value=object.purchase_price title="Ex. VAT" %}
       </div>
     </div>
 
@@ -42,7 +42,7 @@
       <label for="{{ form.salvage_value.id_for_label }}">Replacement Cost</label>
       <div class="input-group">
         <div class="input-group-prepend"><span class="input-group-text">£</span></div>
-        {% render_field form.replacement_cost|add_class:'form-control' value=object.replacement_cost %}
+        {% render_field form.replacement_cost|add_class:'form-control'|set_data:"toggle:tooltip" value=object.replacement_cost title="Ex. VAT" %}
       </div>
     </div>