translate french strings:

    # game/choose_theme.rpy:274
    old "Could not change the theme. Perhaps options.rpy was changed too much."
    new "Impossible de changer le thème. Peut être que options.rpy a été trop modifié."

    # game/choose_theme.rpy:332
    old "Display"
    new "Affichage"

    # game/choose_theme.rpy:333
    old "Window"
    new "Fenêtre"

    # game/choose_theme.rpy:334
    old "Fullscreen"
    new "Plein écran"

    # game/choose_theme.rpy:335
    old "Planetarium"
    new "Planetarium"

    # game/choose_theme.rpy:342
    old "Sound Volume"
    new "Volume sonore"

    # game/choose_theme.rpy:376
    old "Choose Theme"
    new "Choisir un thème"

    # game/choose_theme.rpy:389
    old "Theme"
    new "Thème"

    # game/choose_theme.rpy:413
    old "Color Scheme"
    new "Agencement des couleurs"

    # game/choose_theme.rpy:444
    old "Continue"
    new "Continuer"
