UX: Make nav logo clickable if user is authenticated photoprism#98

Improve readability of assets license

No text changes.

Frontend: Fix other assertions in TestClientManifestUri photoprism#1648

Actual name depends on the filesystem timestamp.

Index: Prevent two primary files in photo stacks photoprism#1823

Frontend: Update package-lock.json

Backend: Update golang.org/x/crypto and golang.org/x/net dependencies

Update README.md

Themes: Code clean-up

MySQL 8: Improve migrate command, ignore errors when dropping indexes

Docs: Update README.md