V127 native normal import syntax fix

- Preserves V125/V126 working SAVE flow.
- Uses BG2 stock native IMPORT Done/Back actions.
- Removes literal backtick characters from the embedded account Lua comments.
  UI.MENU uses backticks as Lua-block delimiters, so those comment characters could split the account runtime and trigger Lua syntax errors at startup.
- No backups, restore, synchronization, or character duplication.
