Invalid File Name Characters

[ben-wals]

This is a bug across many parts of both integrations but if the user submits an invalid character for a file name the program crashes without error to the user.

If these characters are acceptable in Minecraft for renaming / commands then a method to replace them for the file names should be implemented.

If not then the user shouldn't be allowed to submit them in the first place e.g. a popup which says "invalid character entered please submit another answer" and perhaps a list / link to all the characters that aren't accepted