- update to 0.73.4:
* Fix issue with relative links on windows
* Fix reload page after change in external editor
* Fix regressions due to python3.9 change in ElementTree
* Fix regression in nested format in link
* Fix test failure in testing translations
* Let versions control plugin initialize git repro to not quote non-ascii paths
* Update markdown extension and mime-type
* Merge translations
* Fix missing export formats in windows installer
* Add support for environ.ini at startup for portable install
* Make trash function more robust for GLib.Error errors
* Remove xdg import in windows for mimetyping
* Fix regression with GdkPixbuf.PixbufRotation constants
* Fix issues in parser under Python 3.9
* Fix regression with pages with formatting in heading
* Merge translations