Bookmark indicator not updated automatically

##### Version:

```
Vimperator:	3.16.0.20171007131251 (created: 2017/10/07 13:12:52)
Firefox:	Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0
```

##### Description:

After pressing <kbd>Shift</kbd>+<kbd>A</kbd> the ❤️ bookmark indicator is not shown. It requires a tab switch to appear after returning to the bookmarked tab.