Function names don't matter. However, making them all global is bad because that polutes the global namespace, if everyone does it then the client lags. The default UI does enough of this, we don't need to add to it.
Function Names on the other hand, it is always best to make the names senseable and shortly descriptive. This is for a few reasons: Easer for you to debug, easier to others to read and help debug and lastly easier for you to remember what it does.