[Request] Display bookmarked pages in the extension icon.

[dougwl]

This is a request that I found in two other issues here:

One from 2018. And another from August.

Since this is a alternative to a browser bookmark feature or at least a complementary tool, its not farfetched to expect a similar behavior in this aspect. Firefox for example, have the classic star in the addres bar with two different states from when a page is bookmarked or not.

Memex has more options of what to do with a page besides bookmarking, but for starters would be cool to have any color indication or even a check mark on the extension icon, showing that the user has already done something with the page.

An example using badges:

[bepolymathe]

Very good idea.