The default CSS didn't have anything for GtkTreeView's 'dnd' style class. So,
the call to gtk_render_frame() to draw the highlight frame for the drag-dest-row
was getting a border-width of 0, and nothing was drawn as a result.
Now we just copy the default from Adwaita, but make the border-radius 0, to make it
square like the rest of the Raleigh theme...
color: @text_color;
}
+GtkTreeView.dnd {
+ border-color: @internal_element_color;
+ border-radius: 0;
+ border-width: 1px;
+ border-style: solid;
+}
+
*:insensitive {
border-color: shade (@bg_color, 0.7);
background-color: shade (@bg_color, 0.9);