[BUG] Alert names can contain special characters that are invalid in filenames, causing the export to fail

[knappl-mmri]

Describe the bug
Alert names can contain special characters that are invalid in filenames (e.g. :, /, %, $) which cause the export to fail.
The export file name is created up to the point of the invalid character, there is no file extension, and the file is empty.

To Reproduce

Steps to reproduce the behavior:

1. Go to 'Alerts'
2. Click on an existing alert
3. Append ": testing" to the alert name
4. Save alert
5. Export alert
6. Accept the default filename
7. Information message indicates the alert was written successfully to the default filename.
8. Go to Windows File Explorer, navigate to path of exported alert.
9. The export file name is created up to the point of the invalid character (the colon, in this example), there is no file extension, and the file is empty.

Expected behavior
The export filename is expected to match the alert name; the extension should be xml, the file should contain the alert code.

Actual behavior
The export file name is created up to the point of the invalid character, there is no file extension, and the file is empty.

Environment (please complete the following information):

• OS: Windows 10
• Java Distribution/Version Java 1.8.0_181
• Connect Version 4.1.0, 3.10.1

Workaround(s)
Remove the invalid character(s)

Additional context
Invalid characters are not allowed in other areas, e.g. Channel names.