create a setting to allow users to customize the not applicable value

[majin22]

currently, it is fixed to show - (dash)

the settings related to this are

naCalories : false,
naFatCalories : false,
naTotalFat : false,
naSatFat : false,
naTransFat : false,
naPolyFat : false,
naMonoFat : false,
naCholesterol : false,
naSodium : false,
naPotassium : false, //this is for the legacy version
naPotassium_2018 : false, //this is for the 2018 version
naTotalCarb : false,
naFibers : false,
naSugars : false,
naAddedSugars : false,
naProteins : false,
naVitaminA : false,
naVitaminC : false,
naVitaminD : false,
naCalcium : false,
naIron : false,

[majin22]

fixed the bug on the latest release