Fix(l10n): Update translations from Transifex

    <string name="category_play">Reproducir</string>

    <string name="simple_more">Más</string>

    <string name="simple_move">Mover</string>

    <string name="category_readonly">Namás llectura</string>

    <string name="no_category">Nun hai nenguna categoría</string>

    <string name="add_category">Amestar «%1$s»</string>

    <string name="simple_checkbox">Caxellu</string>