Update links (again) to langpacks due to Mozilla changes to CDN

It should to work for the foreseeable future
https://bugzilla.mozilla.org/show_bug.cgi?id=939785
Australis: add noautoclose to the restart checkbox in toolbar button
Australis: more sizes for the icon of the toolbar button
Australis: improve the layout of the toolbar button in menu panel

Fragile. I don't know if the menu-vertical binding will be kept.