[gtk/fix-hover-tracking] main: Update pointer focus state for button releases

[Matthias Clasen <matthiasc src gnome org>]

commit 661da6baec21f390466c7f59249fe7b2d5027320
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 19 16:45:56 2020 -0400

    main: Update pointer focus state for button releases
    
    Failure to do so makes the old pointer focus target
    'sticky', because we end up ignoring the result of
    picking the pointer focus until a motion event comes
    in.
    
    Fixes: #3172

 gtk/gtkmain.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index a72801e8dd..10780b7684 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -1477,17 +1477,19 @@ handle_pointing_event (GdkEvent *event)
                                                                  device,
                                                                  sequence);
       gtk_window_set_pointer_focus_grab (toplevel, device, sequence,
-                                         type == GDK_BUTTON_PRESS ?
-                                         target : NULL);
+                                         type == GDK_BUTTON_PRESS ?  target : NULL);
 
       if (type == GDK_BUTTON_RELEASE)
         {
           GtkWidget *new_target = gtk_widget_pick (native, x, y, GTK_PICK_DEFAULT);
+
           if (new_target == NULL)
             new_target = GTK_WIDGET (toplevel);
+
           gtk_synthesize_crossing_events (GTK_ROOT (toplevel), GTK_CROSSING_POINTER, target, new_target,
                                           event, GDK_CROSSING_UNGRAB, NULL);
           gtk_window_maybe_update_cursor (toplevel, NULL, device);
+          update_pointer_focus_state (toplevel, event, new_target);
         }
 
       set_widget_active_state (target, type == GDK_BUTTON_RELEASE);