X11: set restore-previous-region (#420)

Author: lenemter

data/dock.metainfo.xml.in

@@ -24,6 +24,12 @@
   <update_contact>contact_at_elementary.io</update_contact>
 
   <releases>
+    <release version="8.1.1" date="2025-05-16" urgency="medium">
+      <description>
+        <p>Updated translations</p>
+      </description>
+    </release>
+
     <release version="8.1.0" date="2025-05-11" urgency="medium">
       <description>
         <p>Updated translations</p>

src/MainWindow.vala

@@ -157,7 +157,7 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
 
             var prop = xdisplay.intern_atom ("_MUTTER_HINTS", false);
 
-            var value = "anchor=8:hide-mode=%d:size=-1,%d".printf (settings.get_enum ("autohide-mode"), height);
+            var value = "anchor=8:hide-mode=%d:size=-1,%d:restore-previous-region=1".printf (settings.get_enum ("autohide-mode"), height);
 
             xdisplay.change_property (window, prop, X.XA_STRING, 8, 0, (uchar[]) value, value.length);
         }