Author: Daniel Baumann <daniel.baumann@progress-linux.org>
Description: Setting theme to "system".

diff -Naurp inkscape.orig/src/preferences-skeleton.h inkscape/src/preferences-skeleton.h
--- inkscape.orig/src/preferences-skeleton.h
+++ inkscape/src/preferences-skeleton.h
@@ -508,12 +508,12 @@ static char const preferences_skeleton[]
      flattening="0" />
   <group
      id="theme"
-     defaultPreferDarkTheme="1"
+     defaultPreferDarkTheme="0"
      defaultIconTheme="multicolor"
      defaultGtkTheme="Adwaita"
      narrowSpinButton="1"
-     preferDarkTheme="1"
-     darkTheme="1"
+     preferDarkTheme="0"
+     darkTheme="0"
      symbolicIcons="1"
      symbolicDefaultBaseColors="1"
      symbolicDefaultHighColors="0"/>