Merge pull request #957 from paperless-ngx/feature-created-date

Feature: make frontend timezone un-aware

diff --cc src-ui/src/app/components/document-list/document-card-small/document-card-small.component.html
Simple merge

diff --cc src-ui/src/app/components/document-list/document-list.component.html
Simple merge

diff --cc src/documents/models.py
Simple merge

diff --cc src/documents/serialisers.py
Simple merge