Suggestion: Pinned item for current page

[micmalti]

First of all, thank you for creating this extension. I especially like its clean aesthetic and the fact that users can modify the UI.

A nice feature that I miss from In My Pocket is that, if the current page has already been saved, its link is pinned to the top of the items list. In the absence of a keyword search bar, I think this feature improves interaction with the items on the list, besides making it easier to check whether the current page has already been saved.