[Feature Request] Support ~ in playlist

In `retroarch.cfg` it is possible to use `~` to denote a path to the current user directory. For example ~~~~ rgui_browser_directory = "~/games" rgui_config_directory = "~/.config/retroarch/config" ~~~~ This makes it easy to synchronize the configuration file between different devices. Playlists on the other hand, does not seem to support this feature Example ~~~~ { "version": "1.5", "default_core_path": "", "default_core_name": "", "label_display_mode": 0, "right_thumbnail_mode": 0, "left_thumbnail_mode": 0, "sort_mode": 0, "items": [ { "path": "~/games/psp/supertux/Supertux/EBOOT.PBP", "label": "SuperTux PSP", "core_name": "Sony - PlayStation Portable (PPSSPP)", "core_path": "~/.config/retroarch/cores/ppsspp_libretro.so", "crc32": "00000000|crc", "db_name": "Sony - PlayStation Portable" } ] } ~~~~ I get the error message "Failed to load from playlist".