Log Message:
meld: update to 3.21.2.

2022-06-18 meld 3.21.2
======================

  Features:

   * Folder comparison now supports compare differently-named files across
     panes, by marking files for comparison (Helly Guo)
   * Synchronization points are now significantly easier to use and more
     robust, and have new user documentation (Roberto Vidal)
   * Added option to ignore Unicode normalisation form differences when
     comparing paths (Dan B)
   * The files or folders being compared can now be swapped in two pane mode,
     using the new View -> Swap left and right panes menu item (Helly Guo)
   * Folder comparisons now show a "(scanning...)" indication in tree view
     rows as an additional visual cue that the comparison is still running
     (Kai Willadsen)
   * Folder comparisons have a new optional ISO-format time column (Kai
     Willadsen)

  Fixes:

   * Update icon usage to support stock icon removal from new Adwaita versions
     (Jan Tojnar)
   * Build fix for Meson 0.61.0 (Silvio Fricke)
   * The new pathlabel widgets now support user-provided custom labels (Kai
     Willadsen)
   * Fix file selectors in folder comparisons to always open in the current
     folder (Kai Willadsen)
   * Using a custom save path (i.e., the --output flag) now sets a buffer as
     modified, so that unchanged merges can be saved (Kai Willadsen)
   * Comparing new or deleted rows in folder comparison now opens a two-pane
     file comparisons for consistency (Kai Willadsen)
   * Destructive dialog actions now have appropriate styling (Kai Willadsen)
   * Invalid user settings for folder comparison columns are now handled more
     gracefully (Kai Willadsen)
   * The nightly flatpak build now includes Git to make version control
     comparisons somewhat functional (Kai Willadsen)
   * Issues fixed: #11, #85, #188, #319, #381, #475, #492, #581, #620, #638,
     #645, #660, #662, #672