gtk3: Sync libhandy content rows with upstream

Update based on upstream commit:
https://gitlab.gnome.org/GNOME/libhandy/-/commit/9d043f0345fb1b0deddb4c80fd34430a14c91261

Author: jnsh

common/gtk-3.0/3.24/sass/_libhandy.scss

@@ -158,9 +158,9 @@ list.content {
   > row {
     // Regular rows and expander header rows background
     &:not(.expander):not(:active):not(:hover):not(:selected),
-    &:not(.expander):not(:active):hover:not(.activatable):not(:selected),
+    &:not(.expander):hover:not(.activatable):not(:selected),
     &.expander row.header:not(:active):not(:hover):not(:selected),
-    &.expander row.header:not(:active):hover:not(.activatable):not(:selected) {
+    &.expander row.header:hover:not(.activatable):not(:selected) {
       background-color: $base_color;
     }