fix label

src/main/resources/fess_label.properties

@@ -1237,7 +1237,7 @@ labels.crud_link_delete=Delete
 labels.crud_link_back=Back
 labels.crud_link_edit=Edit
 labels.crud_link_next_page=Next
-labels.crud_link_prev_page=Previous
+labels.crud_link_prev_page=Prev
 labels.crud_title_details=Details
 labels.crud_title_confirm=Confirmation
 labels.admin_brand_title=Fess