Add elements to and cleanup of the CSV

Implements:

• A audibility property, indicating if there is audio playing in the trial;
• A visibility property, indicating if the participant can see during the trial;
• A hasKeypad property, indicating if a tracked keypad is used during the trial;
• Bonus: the `roomMaterialIdentifier in the operator view.

Fixes:

• Removes the existing spaces in the CSVs to avoid problems with spreadsheet editors;
• Fix a weird exception behaviour during the configuration file validation that fill the log with the information that ... a log has been filled.