improve receipt/details reports and implement number formatting

1) eager load reports for receipt/details
2) introduce number_format lookups to replace print_settings for number formatting
3) implement NumberFormattable concern, reference number_format lookups or print_settings if not exist, to get number format settings and number formatting
4) replace rails NumberHelper.number_with_precision with NumberFormattable.number_format hopefully to reduce overhead, formatting numbers for huge lists of data

app/models/sale_tax.rb

@@ -1,4 +1,5 @@
 class SaleTax < ApplicationRecord
+  include NumberFormattable
   self.primary_key = "sale_tax_id"
 
   #primary key - need to be unique generated for multiple shops
@@ -44,7 +45,6 @@ class SaleTax < ApplicationRecord
   def round_to_precision
     if self.tax_payable_amount != self.tax_payable_amount_was
       if self.tax_payable_amount % 1 > 0
-        precision = PrintSetting.get_precision_delimiter().precision.to_i
         self.tax_payable_amount = self.tax_payable_amount.round(precision)
       end
     end