Adjust shadows

Use a thinner shadow with light source from the top
on default theme, slightly larger for hdpi and
xhdpi variants.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

themes/default-hdpi/themerc

@@ -7,6 +7,11 @@ button_spacing=0
 full_width_title=true
 maximized_offset=0
 show_app_icon=true
+shadow_delta_height=-4
+shadow_delta_width=-8
+shadow_delta_x=-10
+shadow_delta_y=-10
+shadow_opacity=100
 title_horizontal_offset=1
 title_shadow_active=under
 title_shadow_inactive=under

themes/default-xhdpi/themerc

@@ -7,6 +7,11 @@ button_spacing=0
 full_width_title=true
 maximized_offset=0
 show_app_icon=true
+shadow_delta_height=-2
+shadow_delta_width=-6
+shadow_delta_x=-8
+shadow_delta_y=-8
+shadow_opacity=100
 title_horizontal_offset=2
 title_shadow_active=under
 title_shadow_inactive=under

themes/default/themerc

@@ -7,6 +7,11 @@ button_spacing=0
 full_width_title=true
 maximized_offset=0
 show_app_icon=true
+shadow_delta_height=-6
+shadow_delta_width=-10
+shadow_delta_x=-12
+shadow_delta_y=-12
+shadow_opacity=100
 title_horizontal_offset=1
 title_shadow_active=under
 title_shadow_inactive=under