CHANDIGARH: The unsavoury developments in the 103-year-old Shiromani Akali Dal, including expelled Akali stalwart Sukhdev Singh Dhindsa and rebel leader Gurpartap Singh Wadala tearing into party chief Sukhbir Singh Badal, are indicative of the party heading for a vertical split. After his expulsion, former party patron Dhindsa slammed the SAD president for the party’s “unconstitutional’’ decisions. Also, rebel Akali leader …