Revert "add ‚default‘ value =>““ for descriptionBefore and descriptionAfter in tl_li_invoice_template"

This reverts commit 0e1f1898224390a0bd3e04946713407e34c69109.
Revert "Revert "add ‚default‘ value =>““ for descriptionBefore and descriptionAfter in tl_li_invoice_template""

This reverts commit a17939cc2b101019dc4aab915a582cf44fd55b8a.
Revert "Revert "Revert "add ‚default‘ value =>““ for descriptionBefore and descriptionAfter in tl_li_invoice_template"""

This reverts commit 69a75df1675c15f215fbeda5dd00d74d645d067f.