Add Filter Empty from Array

[josvanroosmalen]

Feedback from POC for phone number cleansing: Add a togle widget to Array to filter empty values (true/false, default false). To make this more generic: an value is considered empty if:

• The input is null
• The input is instanceof object and the object is empty ( Object.keys(obj).length === 0 ). What about deep checking ( { obj: "", z : [], x: null, y: [{},{a: null]) should be considered empty as a whole?)
• The input is typeof input equals to string and the string is empty (input === "").

[sashamitrovich]

Maybe default should be true?