Use name instead of id when caching game categories

When running the client in offline mode, we do not get game ids as they must be retrieved from the API. Therefore, game names must be used as the cache keys instead.

minigalaxy/ui/library.py

@@ -158,7 +158,7 @@ def __get_installed_games(self) -> List[Game]:
                         game_id = 0
                     else:
                         game_id = int(game_id)
-                category = game_categories_dict.get(game_id, "")
+                category = game_categories_dict.get(name, "")
                 games.append(Game(name=name, game_id=game_id, install_dir=full_path, category=category))
             else:
                 games.extend(get_installed_windows_games(full_path, game_categories_dict))
@@ -183,7 +183,7 @@ def __add_games_from_api(self):
             self.games[self.games.index(game)].url = game.url
             self.games[self.games.index(game)].category = game.category
             if len(game.category) > 0:  # exclude games without set category
-                game_category_dict[str(game.id)] = game.category
+                game_category_dict[game.name] = game.category
         update_game_categories_file(game_category_dict)
 
 
@@ -194,13 +194,12 @@ def get_installed_windows_games(full_path, game_categories_dict=None):
         if re.match(r'^goggame-[0-9]*\.info$', file):
             with open(os.path.join(full_path, file), 'rb') as info_file:
                 info = json.loads(info_file.read().decode('utf-8-sig'))
-                game_id = int(info["gameId"])
                 game = Game(
                     name=info["name"],
-                    game_id=game_id,
+                    game_id=int(info["gameId"]),
                     install_dir=full_path,
                     platform="windows",
-                    category=(game_categories_dict or {}).get(game_id, "")
+                    category=(game_categories_dict or {}).get(info["name"], "")
                 )
                 games.append(game)
     return games