Journal- and NewTiddler- related fr-FR strings

It looks better now.
I'm not sure about this. 
eg: The german version uses `YYYY MMM 0DD.` which is the Date Format we are used to. Starting with the day is confusing for us. Especially the US format 0MM-0DD-YYYY is interpreted wrong by German readers, that are not used to it. Especially if the day is <=12