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/models.py

@@ -135,7 +135,7 @@ class Asset(models.Model, RevisionMixin):
     # Cable assets
     is_cable = models.BooleanField(default=False)
     cable_type = models.ForeignKey(to=CableType, blank=True, null=True, on_delete=models.SET_NULL)
-    length = models.DecimalField(decimal_places=1, max_digits=10,
+    length = models.DecimalField(decimal_places=2, max_digits=10,
                                  blank=True, null=True, help_text='m')
     csa = models.DecimalField(decimal_places=2, max_digits=10,
                               blank=True, null=True, help_text='mm²')
@@ -192,5 +192,5 @@ class Asset(models.Model, RevisionMixin):
         return str(self.asset_id)
 
     @property
-    def name(self):
+    def display_name(self):
         return f"{self.display_id} | {self.description}"