CommonSanitizeFullFilenamePath Method

Takes in a full path to a file (including directory) as a string. Then replaces any illegal characters with a '-' mark, returning the new string.

If the file name, portion of the full path, has an "\" in it (a directory seperator) then the sanitization will not work, as the file name gets mis-interpreted. It is better instead to use the method SanitizePath()

public static string SanitizeFullFilenamePath(
	string fullFilePath
)