Update strings.po

[geogiraux]

Hi I'm a fresh Kodi user, and today you saved my life when I installed your Maximinimalism skin (my wife's life to be honest). Big thanks. But having a few glitches, I went here, didn't find solution but saw I could provide some help. I have :

• add a few articles in the exisiting part
• add what looks like a new section which was missing in the French translation

[chrisbevan]

Thanks - glad you (and your wife) like it! Cheers for the updated strings, i'll get them included in the next update.