Add new themes introduced in @node-red-contrib-themes/theme-collection v4.1

[bonanitech]

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Proposed changes

Node-RED Contrib Theme Collection version 4.1 introduced new themes:

• night-owl
• noctis-azureus
• noctis-bordo
• noctis-minimus
• noctis-obscuro
• noctis-sereno
• noctis-uva
• noctis-viola
• railscasts-extended
• selenized-dark
• selenized-light
• zendesk-garden

This PR adds them as options.

Checklist

• I have read the contribution guidelines
• For non-bugfix PRs, I have discussed this change on the forum/slack team.
• I have run npm run test to verify the unit tests pass
• I have added suitable unit tests to cover the new/changed functionality

[coveralls]

coverage: 81.27%. remained the same
when pulling a16cedf on bonanitech:v4.1-themes
into 04cb60c on node-red:master.

[bonanitech]

Marking as 'ready for review' so it can be merged before v4.1