"Ignored device topics" is too imprecise

[dogtopus]

• An empty string between commas (e.g. topic1,,topic2) blacklists all topics, causing the plugin to ignore everything it saw.
• Generic stuff (e.g. t) massively blacklist topics that it likely shouldn't block (e.g. tele/*, tasmota/*, etc.)

My suggesstion would be switching to fnmatch or regexp against the full topic names instead of just doing naive prefix matching.

[altserg]

Pull requests are welcome :)