[WIP] Add visibility icons in publisher dropdown aspect

This PR add the globe or the lock icon to the publisher aspect dropdown to make more clear that the post is public or limited. Fix https://github.com/diaspora/diaspora/issues/4974
Can someone help me here? I want to test if the li selected in the dropdown is the one with "Public" inside, but text() returns "\n                                Public\n                              " so it is not equal to "Public". How can I ignore the space and \n characters? Should I use another function than text()?