[meld] Update NEWS + appdata

[Kai Willadsen <kaiw src gnome org>]

commit 79a34210b7fa228b17b763adf6b7f2eb01f9e787
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Fri Jan 7 13:44:02 2022 +1000

    Update NEWS + appdata

 NEWS                                  | 119 ++++++++++++++++++++++++++++++++++
 data/org.gnome.meld.appdata.xml.in.in |  14 ++++
 2 files changed, 133 insertions(+)
---
diff --git a/NEWS b/NEWS
index 8dbc5eb3..331d0aab 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,123 @@
 
+2022-01-07 meld 3.21.1
+======================
+
+  UI changes:
+
+   * A new custom per-pane location display widget replaces the standard GTK+
+     file chooser button and our existing placeholder path display, including
+     actions for opening containing folder and copying file paths (Kai
+     Willadsen)
+   * Version control comparison has had its action bar modernised in line with
+     file and folder comparison (Kai Willadsen)
+
+
+  Features:
+
+   * The find bar now remembers the previous search across panes (Jack)
+   * We show a warning to the user if they're trying to compare a file or
+     folder to itself (Jack)
+   * Meld no longer uses custom file chooser dialogs, improving portability
+     and flatpak behaviour (Mario Aichinger)
+   * Two pane comparisons now allow Alt+Right/Left to work in either pane
+     (Anatoli Babenia)
+   * Certain header bar actions (e.g., conflict navigation, filters) are now
+     only shown in their appropriate comparison types (Kai Willadsen)
+   * The application title no longer includes the per-comparison label (Kai
+     Willadsen)
+   * Add a preference for GTK's dark theme support (Kai Willadsen)
+   * Retain clipboard contents after exiting Meld (Kai Willadsen)
+
+
+  Fixes:
+
+   * Fix incorrect detection of FUSE directory comparisons as remote (mscdex)
+   * Fix "Open Externally" on Windows for paths with spaces (adam0antium)
+   * Fix syntax highlighting in version control by using the correct file
+     extension (Alan Suran)
+   * Move application icons into the resource bundle (Vasily Galkin)
+   * Improved error reporting for invalid change actions (Anatoli Babenia)
+   * Fix too-large minimum window size from status bar buttons (Kai Willadsen)
+   * Fix Subversion comparsion on Python 3.9 (Kai Willadsen)
+   * Fix bad translation source strings with multiple arguments (Kai Willadsen)
+   * Fix performance regression in file comparison line splitting logic (Kai
+     Willadsen)
+   * Fix folder comparison sensitivity breaking when cancelling a scan (Kai
+     Willadsen)
+   * Fix occasional traceback when closing comparisons (Kai Willadsen)
+   * Fix orphaned comparison helper process when quitting (Kai Willadsen)
+   * Minor UI fixes:
+     * Fix About dialog URL (TotalCaesar659)
+     * Update About dialog copyright (Kai Willadsen)
+     * The new comparison page now better distinguishes the "Compare" and
+       "Blank Comparison" actions (Kai Willadsen)
+     * The comparison overview map is now more responsive when dragging (Kai
+       Willadsen)
+     * The find bar now waits briefly before searching to improve
+       responsiveness (Kai Willadsen)
+     * The find bar no longer hides when it loses focus (Kai Willadsen)
+     * Allow preferences dialog to be resized (Kai Willadsen)
+     * Main menu can now be activated with F10
+     * Find next/previous can now be activated with F3/Shift+F3 (Kai Willadsen)
+   * Windows fixes:
+     * Add a MeldConsole.exe executable for running Meld from the console (Kai
+       Willadsen)
+     * Update Windows build to force all-users installation (Kai Willadsen)
+     * Improve default monospace font on Windows (Kai Willadsen)
+     * Fix empty line height and fallback fonts by changing the Pango font
+       backend to fontconfig on Windows (Kai Willadsen)
+     * Add Meld's install directory to the Windows PATH (Kai Willadsen)
+     * Add a basic GTK settings.ini for Windows builds (Kai Willadsen)
+     * Add the Meld icon to the Windows add/remove programs UI (Kai Willadsen)
+     * Fix file comparison holding a directory handle after close (Kai
+       Willadsen)
+   * Issues fixed: 25, 91, 143, 354, 433, 445, 453, 459, 477, 482, 488, 491,
+     499, 502, 526, 530, 539, 541, 557, 561, 564, 565, 571, 579, 590, 603
+
+
+  Internal changes:
+
+   * Modernise and improve the new Meson build rules (Iñigo Martínez)
+   * CI + build improvements (Jason Edson, Jordan Petridis, Vasily Galkin, Kai
+     Willadsen)
+   * Nightly Meld builds now use the standard nightly icon styling (Kai
+     Willadsen)
+   * Clarify licensing in appdata (Kai Willadsen)
+   * Windows build fixes (Kai Willadsen)
+   * Add documentation on hosting infrastructure (Kai Willadsen)
+
+
+  Translations:
+
+   * Anders Jonsson (sv)
+   * Andika Triwidada (id)
+   * Asier Sarasua Garmendia (eu)
+   * Ask Hjorth Larsen (da)
+   * Balázs Úr (hu)
+   * Christian Kirbach (de)
+   * Clay Stan (zh_CN)
+   * Daniel Mustieles (es)
+   * Daniel Șerbănescu (ro)
+   * Dz Chen (zh_CN)
+   * Emin Tufan Çetin (tr)
+   * Enrico Nicoletto (pt_BR)
+   * Hugo Carvalho (pt)
+   * Jiri Grönroos (fi)
+   * Jordi Mas (ca)
+   * Julien Hardelin (fr)
+   * Luna Jernberg (sv)
+   * Marek Černocký (cs)
+   * Matej Urbančič (sl)
+   * Muhammet Kara (tr)
+   * Philipp Kiemle (de)
+   * Piotr Drąg (pl)
+   * Rafael Fontenelle (pt_BR)
+   * Rodrigo Lledó (es)
+   * Yi-Jyun Pan (zh_TW)
+   * Yuri Chornoivan (uk)
+   * Мирослав Николић (sr)
+
+
 2020-04-19 meld 3.21.0
 ======================
 
diff --git a/data/org.gnome.meld.appdata.xml.in.in b/data/org.gnome.meld.appdata.xml.in.in
index 2590df59..3bbba995 100644
--- a/data/org.gnome.meld.appdata.xml.in.in
+++ b/data/org.gnome.meld.appdata.xml.in.in
@@ -52,6 +52,20 @@
   <translation type="gettext">meld</translation>
   <content_rating type="oars-1.1" />
   <releases>
+    <release date="2022-01-07" version="3.21.1">
+      <description>
+        <p>
+          This is an unstable release in the 3.21 development series.
+        </p>
+        <ul>
+         <li>New location display for comparison panes</li>
+          <li>New action bar layout for version control comparisons</li>
+          <li>Dark theme can be toggled in preferences</li>
+          <li>Various improvements to find bar, comparison notifications, and keyboard ergonomics</li>
+          <li>Updated translations</li>
+        </ul>
+      </description>
+    </release>
     <release date="2020-04-19" version="3.21.0">
       <description>
         <p>