Support for more visual differentiation of private/read-later bookmarks

[gingerbeardman]

Is your feature request related to a problem? Please describe.
It's difficult to visually notice private/to-read bookmarks

Coming from Pinboard, it does:

• red title for read later
• grey background for private

Icons in LinkAce go some way to showing this information, but they are lost or difficult to see as there are other icons on screen in the same location (site icon).

Describe the solution you'd like

• red title or page curl, for read laterbookmarks
• grey background, for private bookmarks

Describe alternatives you've considered

• Pinboard