[feature request] badges for search result icons

[Nicolai Weitkemper]

There are multiple ways in which badges on search result icons could be useful:

• show tab status (pinned, audible, …) (see #190)
• show search result type (bookmark, recent, … | currently not necessary because of sections)

Most importantly, badges seem like a more future-proof concept than implementing pinned/audible/… indicators individually.