Allow me to "View SQL" code on "Invoice Filters" just like on "Customer Filters"
I sometimes need to make a small tweak to the SQL code in the "Invoice Filters". However, currently there is no way to "View SQL" code in the "Invoice Filters", only the "Customer Filter". With "Customer Filters" I create a filter, then "View SQL" code to make small changes, and copy and paste into "Write Own SQL". Not knowing the table structure, this makes it very easy to do this. .But the "Invoice Filters" do not offer this option.
