theme: Use 0.5 opacity for disabled pictures

If a GtkImage is using an icon we use a gtk-icon-filter to se the icon
opacity when in insensitive state, however when using other kinds of
pictures we do not apply the same style leading to an inconsistent
result.

Closes: #5683

diff --git a/gtk/theme/Default/_common.scss b/gtk/theme/Default/_common.scss
index 6e8aa4e50339869d469cb2c8de19b249b9ce67f4..7135eba9ac4ef84ddb8f2ccc4018886398a34118 100644 (file)
--- a/gtk/theme/Default/_common.scss
+++ b/gtk/theme/Default/_common.scss
@@ -43,6 +43,10 @@ image:disabled {
   -gtk-icon-filter: opacity(0.5);
 }
 
+picture:disabled {
+  opacity: 0.5;
+}
+
 .view,
 %view {
   color: $text_color;