Bug 498072 - GnuCash show taxes on invoice when individual taxes is not checked

Use more descriptive option name and tool tip as proposed in the bug.

gnucash/report/business-reports/invoice.scm

@@ -316,8 +316,8 @@ for styling the invoice. Please see the exported report for the CSS class names.
 
   (gnc:register-inv-option
    (gnc:make-simple-boolean-option
-    (N_ "Display") (N_ "Individual Taxes")
-    "o" (N_ "Display all the individual taxes?") #f))
+    (N_ "Display") (N_ "Use Detailed Tax Summary")
+    "o" (N_ "Display all tax categories separately (one per line) instead of one single tax line.?") #f))
 
   (gnc:register-inv-option (gnc:make-internal-option "Display" "Totals" #t))
 
@@ -415,7 +415,7 @@ for styling the invoice. Please see the exported report for the CSS class names.
      (gnc:lookup-option options section name)))
 
   (let ((show-payments (opt-val "Display" "Payments"))
-        (display-all-taxes (opt-val "Display" "Individual Taxes"))
+        (display-all-taxes (opt-val "Display" "Use Detailed Tax Summary"))
         (display-subtotal? (opt-val "Display" "Subtotal"))
         (lot (gncInvoiceGetPostedLot invoice))
         (txn (gncInvoiceGetPostedTxn invoice))

libgnucash/app-utils/options.scm

@@ -1723,6 +1723,7 @@
                                         "Void Transactions?" (cons "Filter" "Void Transactions")
                                         "Void Transactions" (cons "Filter" "Void Transactions")
                                         "Account Substring" (cons "Filter" "Account Name Filter")
+                                        "Individual Taxes" (cons "#f" "Use Detailed Tax Summary") ;invoice.scm, renamed November 2018
                                         ))
                        (name-match (member name new-names-list)))