update pdf viewer and remove CORS check

res/static/misc/pdf-viewer/web/locale/ur/viewer.properties

@@ -93,6 +93,7 @@ document_properties_page_size_unit_millimeters=mm
 document_properties_page_size_orientation_portrait=عمودی انداز
 document_properties_page_size_name_a3=A3
 document_properties_page_size_name_a4=A4
+document_properties_page_size_name_letter=خط
 document_properties_page_size_name_legal=قانونی
 # LOCALIZATION NOTE (document_properties_page_size_dimension_string):
 # "{{width}}", "{{height}}", {{unit}}, and {{orientation}} will be replaced by
@@ -191,6 +192,9 @@ invalid_file_error=ناجائز یا خراب PDF مسل
 missing_file_error=PDF مسل غائب ہے۔
 unexpected_response_error=غیرمتوقع پیش کار جواب
 
+# LOCALIZATION NOTE (annotation_date_string): "{{date}}" and "{{time}}" will be
+# replaced by the modification date, and time, of the annotation.
+
 # LOCALIZATION NOTE (text_annotation_type.alt): This is used as a tooltip.
 # "{{type}}" will be replaced with an annotation type from a list defined in
 # the PDF spec (32000-1:2008 Table 169 – Annotation types).