* (bugs 5051, 5376) All tooltips and accesskeys moved out of Monobook.js and into their own system messages. JavaScript is now only used to attach the prefix to the accesskey in the tooltip.
* Todo: 37 languages still need to be internationalized by refactoring the Monobook.js format into the new format (I did 17 before giving up out of exhaustion). Until this happens, the tooltips will show up in English for these languages.
* Todo: be generous and add all these new tooltips to non-Monobook skins.