also make clients tiled on map

While making them tiled on the first commit was needed to fix Firefox
starting with rounded corners, if you don't set them tiled again on map
resizing mpv after starting it with a rule that makes it floating
behaves wrong.

Fixes d1ebf3c.
Fixes https://codeberg.org/dwl/dwl/issues/1247.

dwl.c

@@ -1924,6 +1924,8 @@ mapnotify(struct wl_listener *listener, void *data)
 	}
 
 	/* Initialize client geometry with room for border */
+	client_set_tiled(c, WLR_EDGE_TOP | WLR_EDGE_BOTTOM | WLR_EDGE_LEFT |
+			WLR_EDGE_RIGHT);
 	c->geom.width += 2 * c->bw;
 	c->geom.height += 2 * c->bw;