Add custom error controller and pages [fixes #69530276]
Update errored layout
Add validation to policy year [fixes #69345350]
Rationalize model validations so there is only one validation per attribute
Show date/time when a task was last updated and date when a task was assigned [fixes #69621098]
Allow any asset that has a geometry to be mapped
Unpatch the show method
Add Boostrap Typeahead mixin as it is removed from BS3
Merge branch 'master' of https://github.com/camsys/transam_core into upgrade-to-bootstrap3