Only show the "Test plural forms"-button on the qu edit page when the current language requires more than 2 plural forms (references #261)

views/quantityunitform.blade.php

@@ -57,7 +57,10 @@
 			))
 
 			<button id="save-quantityunit-button" class="btn btn-success">{{ $__t('Save') }}</button>
+
+			@if(intval($pluralCount) > 2)
 			<button id="test-quantityunit-plural-forms-button" class="btn btn-secondary">{{ $__t('Test plural forms') }}</button>
+			@endif
 
 		</form>
 	</div>