Fix dataset keyword naming from "training-size" to "train-size" in dataset_handler and model_handler

Add dataset nicknames for training and test sizes in get_datasets_nickname

Update TITAN leaderboard tab content and streamline data retrieval methods

Fix condition checks in get_datasets_nickname to use equality comparison for dataset names

Reorder conditions in get_datasets_nickname to prioritize 'csharp' over 'c'

Reorder conditions in get_datasets_nickname to prioritize 'csharp' over 'c'

Large refactor

Test

Copy from template