Bug 5016: Fix some translation issues with English PDF order templates

Changes made:
- Instead of n° print no.
- Market Identification => Market identification
- GST => Tax

To test:
- Create at least 2 baskets with one or more orders
- Create a basket group with those baskets
- Print the PDF using
  - the 2 page layout
  - the 3 page layout
- Verify that the changes made appear and everything looks correct

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Koha/pdfformat/layout2pages.pm

@@ -61,7 +61,7 @@ sub printorders {
     
     my $abaskets;
     my $arrbasket;
-    my @keys = ('Basket (No.)', 'Document', 'Qty', 'RRP tax inc.', 'Discount', 'GST', 'Total tax exc.', 'Total tax inc.');
+    my @keys = ('Basket (no.)', 'Document', 'Qty', 'RRP tax inc.', 'Discount', 'Tax', 'Total tax exc.', 'Total tax inc.');
     for my $bkey (@keys) {
         push(@$arrbasket, $bkey);
     }

Koha/pdfformat/layout3pages.pm

@@ -85,7 +85,7 @@ sub printorders {
         my $pdftable = new PDF::Table();
         my $abaskets;
         my $arrbasket;
-        my @keys = ('Document', 'Qty', 'RRP tax exc.', 'RRP tax inc.', 'Discount', 'Discount price', 'GST rate', 'Total tax exc.', 'Total tax inc.');
+        my @keys = ('Document', 'Qty', 'RRP tax exc.', 'RRP tax inc.', 'Discount', 'Discount price', 'Tax rate', 'Total tax exc.', 'Total tax inc.');
         for my $bkey (@keys) {
             push(@$arrbasket, $bkey);
         }
@@ -204,7 +204,7 @@ sub printbaskets {
     my $abaskets;
     my $arrbasket;
     # header of the table
-    my @keys = ('Lot',  'Basket (No.)','Total RRP tax exc.', 'Total RRP tax inc.', 'GST rate', 'GST', 'Total discount', 'Total tax exc.', 'Total tax inc.');
+    my @keys = ('Lot',  'Basket (No.)','Total RRP tax exc.', 'Total RRP tax inc.', 'Tax rate', 'Tax', 'Total discount', 'Total tax exc.', 'Total tax inc.');
     for my $bkey (@keys) {
         push(@$arrbasket, $bkey);
     }