checkbox text filter weird results

Yes, I know this will not be fixed, I'm just logging this so someone else with this issue does not "burn" 2.5 hours of debugging like I did..
On an existing project with this version of jpList I noticed that the filter results using the Checkbox-text-filter were incorrect.
After a lot of testing I found that the results are incorrect when the value contains a hyphen (-)

This does not work correctly:

```

This does:

```

So I simply replaced the - with _ (is an option in my use case) and the filtering worked correctly