Merge themes with duplicate user.css to a single theme with different
color schemes.
This applies to:
- CherryBlossom, JarvisBot, DanDrumStone
- VPFut, OneDarkish
- Lovelace, TychoAwake
- Aritim-Dark, Arc-Dark
- Bloody, Dark
Among themes with the same user.css the older has been kept.
