Allow saving empty locales

[RomanovM]

nopCommerce version: 4.60

When a translation is empty the value will is not saved. We need a couple translations to be empty or blank. I believe when there is no value, the resource name is displayed. We just need nothing to be displayed.

Source: https://www.nopcommerce.com/boards/topic/98366/language-translation-empty-value

P.S. But ensure that we do not trim entered values (see the comment below)

[brandon7171]

When editing string resources, an empty value when searching brings back all resources. It would be nice for anyone who saves an empty value to have a way to filter the empty resource values. There are a lot of resources to search though to find any you saved as empty. Maybe phase 2.

[brakim]

I don't see the purpose of this, but if it is implemented tt should be a setting to allow storing blanks. It's a pretty good indicator that the key is rendered when a translation is missing.

To allow storing blank as default can be misleading and confusing.

[SelectSystemsInternational]

Also with this allow the entry of spaces formattedattributes.priceadjustment has a space at the front (once you take the space out you cant put it back)

I can fix it in mine as I have a custom string that I am using to display and I added the space in the code Maybe this is the better fix if your not doing anything about the other issue above

There are 3 strings that start with a space FormattedAttributes.PriceAdjustment Products.ProductAttributes.PriceAdjustment.PerItem ProductAttributes.Quantity