Small Wii-U Web UI improvements, "success" alert toggle...

+ Made some tweaks to the width of the columns (and div-based buttons) for the Wii-U Web UI to make things look a bit more refined.
+ Added "confirm" option near the top of the Wii-U Web UI PHP file, set to true to retain the old behavior of receiving the Javascript-based alert to successful command sending, or set to false to suppress that dialog (I realized how quickly it gets to be annoying for me…)
+ Shortened the Wii-U Web UI's HTML document title so it can appear entirely within the standard width of the Wii-U NetFront browser's Bookmarks manager.