Bug Fix for Antenna Custom Filter

Yesterday I got a bug report about the custom filters in Antenna. Apparently the URLs added were concatenated to each other rather than adding them to a line each. It's weird because the way they are added has been the same forever, but I've counted lines in the filters and found that some have several lines...

Anyway, it's fixed now!

-- CC0 ew0k, 2022-01-25