GtkColorSwatch: Avoid style context underflow

The last change accidentally removed the later restore, and
left the earlier, so we ended up with a restore-save sequence.
Thankfully, GtkStyleContext warns about this.

gtk/gtkcolorswatch.c

@@ -183,8 +183,6 @@ swatch_draw (GtkWidget *widget,
       g_object_unref (gicon);
     }
 
-  gtk_style_context_restore (context);
-
   /* now draw the overlay image */
   gtk_style_context_get_border (context, state, &border);
   gtk_style_context_get_padding (context, state, &padding);
@@ -222,6 +220,8 @@ swatch_draw (GtkWidget *widget,
       gtk_render_focus (context, cr, 0, 0, width, height);
     }
 
+  gtk_style_context_restore (context);
+
   return FALSE;
 }