Comment 25 for bug 1363245

Hello!
Here is a small update for new or changed strings for Symbols dialog.
Translation is still at 94% but I'll probably keep it as with the current update unless I find some typos.
(Only some Extensions are non-translated, I prefer to avoid the translation of things I don't understand, know or specifically find in UI).
Now I'll focus on updating tutorials!

Thanks jazzynico!