We now have the latest GTK+ 3 fork in our test repo, 2.3.1, which replaces 2.1.5 there. The 1.7.5 whiskermenu we ship as default with MX is the last release of the GTK 2 version. If you use a rather old xfce4 style theme that doesn't support GTK+ 3, you probably see style and color oddities if you upgrade to the 2.X series, but our default Arc themes will have no trouble with it.
Changes since 2.1.5 include:
2.3.1
=====
- Fix crash when reload is required.
- Translation updates: Catalan, Czech, Danish, Greek, Spanish, Finnish,
Japanese, Korean, Malay, Dutch, Polish, Russian, Slovak.
2.3.0
=====
- Fix sidebar wider than iconless categories.
- Add buttons for individual logout commands. (bug #14639)
- Add option to stay visible when focus is lost. (bug #12240)
- Always allow positioning commands next to search.
- Improve preferences spacing. (bug #14683)
- Translation updates: Bulgarian, Catalan, Chinese (China),
Chinese (Taiwan), Czech, Danish, Dutch, French, German, Greek,
Lithuanian, Nepali, Polish, Portuguese, Portuguese (Brazil),
Russian, Serbian, Slovak, Slovenian, Turkish, Welsh.
2.2.1
=====
- Fix category button staying active when dragged. (bug #14419)
- Fix regression of non-square panel image support. (bug #14506)
- Fix redundant hiding of menu.
- Fix sidebar buttons retaining incorrect width.
- Fix commands not following sidebar.
- Translation updates: English (United Kingdom), Georgian, Japanese,
Serbian, Slovak, Slovenian, Spanish, Swedish.
2.2.0
=====
- Fix panel icon size not following theme.
- Disable opacity option when non-composited.
- Rename option for including favorites in recent.
- Load applications in a thread. (bug #12903)
- Slide out search results.
- Require GTK+ version 3.22.
- Translation updates: Amharic, Belarusian, Bulgarian, Catalan,
Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish, Dutch,
Esperanto, French, German, Lithuanian, Nepali, Polish, Portuguese,
Portuguese (Brazil), Romanian, Russian, Slovak, Slovenian, Turkish.
2.1.7
=====
- Fix memory leak when recreating window.
- Use HTTPS for plugin website.
- Translation updates: Bulgarian, French, Turkish.
2.1.6
=====
- Fix losing search focus. (bug #14209)
- Fix crash when last search action is deleted.
- Fix menu shown in alt-tab.
- Translation updates: Bulgarian, Catalan, Chinese (Taiwan), Czech,
Danish, Finnish, German, Lithuanian, Polish, Portuguese, Spanish.
