Sorry for no documentation!

Hi! Developing a tool that is translated on Translatewiki, I have a bad habit of submitting documentation for messages only after they've reached Translatewiki. I've noticed that some of translators, including you, are so fast that they translate the messages withing several hours after they are added. Which means that you folks have to translate them without documentation. Sorry for that! I'll try to improve. Meanwhile, I've added the documentation for all Convenient Discussions messages, so you can check with it now if there was something unclear to you.