Add updated support for T1M 2.14

[lahm86]

• Remove any LevelSequenceType.Fix_Pyramid_Secret entries when writing the gameflow as this is no longer used (see LostArtefacts/TRX#790).
• Add fix_floor_data_issues setting (see LostArtefacts/TRX#790).
• Add fix_speeches_killing_music setting (see LostArtefacts/TRX#789).