April 12, 2016 Patch

{{Patch layout
 * source = http://store.steampowered.com/news/21327/
 * source-title = Dota 2 Update - April 12th, 2016
 * before = 2016-04-05
 * after = 2016-04-13
 * notes =
 * Fixed demo mode preview for hero ability models.
 * Added alternate UI Main track for Music Packs.


 * changes =
 * The BTS Series tier now changed from Amateur to Professional and region from Americas to unset.
 * Seems to have fixed some minor issue with the Techies arcana screen text.

Tournament items
}}
 * SL i-League Invitational Season 1
 * UK Meme Haus League
 * Dota 2 Canada Cup Season 7 - Open Qualifiers
 * COPA D2EG 4
 * Japan Dota Cup 2016 SEASON 1
 * Learn Dota 2 Spring League