Specify background color for b&w watches

src/c/neat_bar.c

@@ -380,6 +380,8 @@ void neat_bar_layer_set_icon(NeatBarLayer *neat_bar, ButtonId button_id, GBitmap
 	bitmap_layer_set_bitmap(current_bitmap_layer, icon);
 #if PBL_COLOR
 	bitmap_layer_set_compositing_mode(current_bitmap_layer, GCompOpSet);
+#else
+	bitmap_layer_set_background_color(current_bitmap_layer, neat_bar->background_color);
 #endif
 }