Updated Themes (markdown)
Add entry to theme list
adding Midnight theme
Add a new trilium theme
Modify wiki to adapt the 0.48.x version.
Added my Miku Hatsune Theme
Added a Solarized Theme
Added Theme
updated theme repository name/link
added link to my theme
added melon theme
updated screenshots
Added link to lightslategray theme
fix
added steel blue theme
custom CSS themes