File mozilla-kde-force-xdg-portal.patch of Package MozillaThunderbird.40006

The Firefox pref `widget.use-xdg-desktop-portal.file-picker` is a tristate with the states:
0 - Never
1 - Always
2 - Auto
where Auto means "yes" if Firefox detects that is run inside a flatpak, or if a certain env-variable is set, "no" otherwise.
With this patch, we flip the auto-state also to "yes" (for the file-picker only!), if we are running KDE.

diff --git a/widget/gtk/WidgetUtilsGtk.cpp b/widget/gtk/WidgetUtilsGtk.cpp
index afa392d0d5a1f..c7621c1d0c0a2 100644
--- a/widget/gtk/WidgetUtilsGtk.cpp
+++ b/widget/gtk/WidgetUtilsGtk.cpp
@@ -294,6 +294,8 @@ bool ShouldUsePortal(PortalKind aPortalKind) {
   const int32_t pref = [&] {
     switch (aPortalKind) {
       case PortalKind::FilePicker:
+        // We want to use the FilePicker-Portal on KDE, if possible
+        autoBehavior |= IsKdeDesktopEnvironment();
         return StaticPrefs::widget_use_xdg_desktop_portal_file_picker();
       case PortalKind::MimeHandler:
         // Mime portal breaks default browser handling, see bug 1516290.