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No button. Nothing. But this is experimental so maybe down the road...

Ulasan ini dibuat untuk versi pengaya (0.2) sebelumnya. 

I tested with 102.8.0, and the button can be elusive. It seems to have problems with remote addressbooks, like CardDAV. When a remote update changes the displayed contact, the button goes away.
I should be able to detect that refresh and redisplay the button.