Fix:2233 Added localization of file delete dialog

locales/en-US/editor.properties

@@ -83,6 +83,8 @@ EXT_DELETED_MESSAGE=<span class='dialog-filename'>{0}</span> has been deleted on
 CONFIRM_FOLDER_DELETE_TITLE=Confirm Delete
 # {0} will be replaced by a directory name
 CONFIRM_FOLDER_DELETE=Are you sure you want to delete the folder <span class='dialog-filename'>{0}</span>?
+# {0} will be replaced by a file name
+CONFIRM_FILE_DELETE=Are you sure you want to delete <span class='dialog-filename'>{0}</span>?
 FILE_DELETED_TITLE=File Deleted
 
 # General Dialog/Button labels

src/document/DocumentCommandHandlers.js

@@ -1659,7 +1659,7 @@ define(function (require, exports, module) {
             DefaultDialogs.DIALOG_ID_EXT_DELETED,
             Strings.CONFIRM_FOLDER_DELETE_TITLE,
             StringUtils.format(
-                "Are you sure you want to delete <span class='dialog-filename'>{0}</span>?",
+                Strings.CONFIRM_FILE_DELETE,
                 StringUtils.breakableUrl(entry.name)
             ),
             [