March 31, 2016 Patch

{{Patch layout
 * sort = 2016-03-31
 * source = http://store.steampowered.com/news/21111/
 * source-title = Dota 2 Update - March 31th 2016
 * source2 = http://store.steampowered.com/news/21114/
 * source2-title = Update 2
 * before = March 30, 2016 Patch
 * after = April 05, 2016 Patch
 * notes =
 * Fixed holding Alt to show hero icons.
 * Fixed bug where cursor could remain invisible forever when spectating a game in camera smooth drag mode while the game ends
 * Fixed a bug where the cursor could remain not at its default icon if you disconnected while your cursor was in a different state(for example, the attack cursor)
 * Fixed {{H|Lone Druid}}'s Bear appearing greyscale even when Lone Druid had an {{I|Aghanim's Scepter}}.
 * Fixed the courier's Magic Immunity being purgeable.

Update 2

 * Ranked Captain's Mode now selects the highest ranked player of each team to be captain.
 * If a captain disconnects in Captain's Mode, another player is chosen to be team captain.
 * Fixed a bug where quickcast on release would trigger untargetted items twice.
 * Upgrading while teleporting no longer interrupts the teleport.
 * Fixed a number of controlled units not respecting the Summoned Units Auto-attack setting.
 * Fixed the sharing of s with some non-hero units.
 * 's now affects hidden units as well, for example during 's.

}}
 * changes =
 * Removed Winter 2016 Battle Pass and associated Treasures from the store.