> No idea; it's an older feature copied by OpenSUSE from kdepim.

Any way to trace that history? The icon must do _something_.

I tried an https site. The lock icon appears but I did not see the receptacle icon do anything.

Clicking on both the lock and filter icons produced dialog boxes. Nothing with the receptacle icon.

BTW, when I tried the https site I got clobbered with oodles of certificate questions.