Update The Daily Mail
version 1.16
DOCX Input: Fix error when converting DOCX file that contains only image based links and no text based links. Fixes #1263021 [Book failed to convert docx to ePub](https://bugs.launchpad.net/calibre/+bug/1263021)
Edit book: Fix deleting a file that is currently open in an editor, not auto-closing the editor
Edit book: When deleting files, automatically remove all entries that refer to them from the ToC
Refresh editor containing toc is present when deleting files causes toc to change
Fix running check book with no book opened gives an error message
Edit book: Handle epub files which contain opf files with no <metadata> tags
Fix #1263177 [Typo ("a the") in user-visible message](https://bugs.launchpad.net/calibre/+bug/1263177)
Edit book: Fix crash that happens sometimes when deleting multiple files. Fixes #1263179 [Editor quits while deleting files with "delte" key](https://bugs.launchpad.net/calibre/+bug/1263179)
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Edit book: Fix a typo causing the preferences for which windows occupy which corners to not work