invoice: money fields without currency, title cleanup (#1254)

tests/Invoice/Renderer/DebugRendererTest.php

@@ -60,10 +60,13 @@ class DebugRendererTest extends TestCase
             'invoice.currency',
             'invoice.vat',
             'invoice.tax',
+            'invoice.tax_nc',
             'invoice.total_time',
             'invoice.duration_decimal',
             'invoice.total',
+            'invoice.total_nc',
             'invoice.subtotal',
+            'invoice.subtotal_nc',
             'template.name',
             'template.company',
             'template.address',
@@ -123,7 +126,9 @@ class DebugRendererTest extends TestCase
             'entry.description',
             'entry.amount',
             'entry.rate',
+            'entry.rate_nc',
             'entry.total',
+            'entry.total_nc',
             'entry.currency',
             'entry.duration',
             'entry.duration_decimal',