Program crashes and does not complete saving report if special characters or slashes, commas, etc. were used in client id field

[MichaelWoodc]

On creation of the PDF file, the info input in the main menu gets included in the file name. When there are unpermitted characters for the file name entered into the form, writing the file obviously fails, and the program crashes without producing a report. It seems the issue could be resolved by removing all unpermitted characters from the file name string before writing the file. We could also block those keys from the pygame events.