Multiple features connected with user management and ownership of databases

Closes #201

Closes #195

Added Features in Malaysia and shortly afterwards:

• Added private subsets where only metadata is published
• Added DataCite mandatory fields on databases and queries
• Added DataCite fields for queries: 1) ORCID 2) Related Identifiers
• Added download of metadata in .xml
• Added the export query button again
• Added the export table button again
• Added user info support
• Added password reset
• Added time travel selector with chart
• Added persistent dark mode, yeaaay
• Re-worked interfaces of database info, database tables, database queries, persisted queries (landing page)