Fix selecting next game

gui.py

@@ -294,16 +294,18 @@ class GameSelector:
             return first_game
         return self._games[self._selection]
 
-    def get_next_selection(self) -> Optional[Game]:
+    def select_next(self) -> Optional[Game]:
         current = self._list.curselection()
         if not current:
             return self.get_selection()
-        game_name = self._list.get(current[0]+1)
-        if game_name:
-            return self._games[game_name]
-        else:
+        next_idx = current[0]+1
+        game_name = self._list.get(next_idx)
+        if not game_name:
             # this was the last game on the list
             return None
+        self._list.selection_set(next_idx)
+        self._selection = game_name
+        return self._games[game_name]
 
 
 class _BaseVars(TypedDict):
@@ -856,9 +858,9 @@ if __name__ == "__main__":
             create_game(491115, "Paladins"),
             # create_game(460630, "Tom Clancy's Rainbow Six Siege"),
         ])
-        gui.games.get_next_selection()
-        gui.games.get_next_selection()
-        gui.games.get_next_selection()
+        gui.games.select_next()
+        gui.games.select_next()
+        gui.games.select_next()
         # Channel list
         gui.channels.display(create_channel("PaladinsGame", 0, None, 0, 0))
         channel = create_channel("Traitus", 1, None, 0, 0)