add set_ui_mode() method

Closes #242

steam/client/builtins/user.py

@@ -135,3 +135,14 @@ class User(object):
         self.send(MsgProto(EMsg.ClientGamesPlayed),
                   {'games_played': [{'game_id': app_id} for app_id in app_ids]}
                   )
+
+    def set_ui_mode(self, uimode):
+        """
+        Set UI mode. Show little icon next to name in friend list. (e.g phone, controller, other)
+
+        :param uimode: UI mode integer
+        :type  uimode: :class:`EClientUIMode`
+
+        These app ids will be recorded in :attr:`current_games_played`.
+        """
+        self.send(MsgProto(EMsg.ClientCurrentUIMode), {'uimode': EClientUIMode(uimode)})

steam/enums/common.py

@@ -803,6 +803,13 @@ class EAppType(SteamIntEnum):
     DepotOnly = -2147483648
 
 
+class EClientUIMode(SteamIntEnum):
+    Desktop = 0
+    BigPicture = 1
+    Mobile = 2
+    Web = 3
+
+
 # Do not remove
 from enum import EnumMeta