This update for human-theme-gtk fixes the following issues:

New upstream release (2.3.0)

  * (gtk 3) new design for Mate notifications
    PR => github.com/mate-desktop/mate-notification-daemon/pull/232
    PR => github.com/mate-desktop/mate-notification-daemon/pull/233
    mate-notification-daemon v1.28.4+
  * (gtk 3) fix design for Bleachbit
    PR => github.com/bleachbit/bleachbit/pull/1195
    bleachbit v?
  * (gtk 3) update design for mate-control-center & ccsm
  * (gtk 3) fix icon size in titlebar for xfwm4
  * (gtk 3) fix padding in titlebar when maximized for xfwm4
  * (gtk 3) same design between Mate and Xfce for terminal & alttab
    PR => github.com/mate-desktop/marco/pull/789
    marco v1.28.2+
  * (gtk 3) update font color for mate-panel
  * (gtk 3) fix font color for mate keyboard indicator
  * (gtk 3) fix background for disabled view for Caja (F3)
  * (gtk 3) fix lines (treeview) for disabled view for Caja (F3)
  * (gtk 3) fix design of progressbar in statusbar for Eom
  * (gtk 3) fix design for Mate osd when compositor is enabled
  * (gtk 3 & 4) fix design of progressbars with text in statusbar
  * (gtk 3 & 4) fix and update design of progressbars with text
  * (gtk 3 & 4) update background for selected lines in treeviews
  * (gtk 3 & 4) add highlight effect for icons on hover
  * (gtk 3 & 4) better contrast for progressbars/scales background
  * (gtk 3 & 4) little enhancement for headarbar
  * (gtk 4) fix for the stupid hover effect on menubar items
  * (gtk 4) fix background of menu items
  * (gtk 4) add design for listviews (open/save dialogs)
  * (gtk 4) add design open/save dialogs
  * (gtk 4) no changes required from 4.12 to 4.18!

- The best with gtk3-classic and gtk4-classic
    gist.github.com/luigifab/0fce786cdb93b5687069a82f490ea95e
  * (gtk 3) automatic min-width/min-height for progressbars
  * (gtk 4) add dual text color for progressbars