Unselecting a language from TV Server Configuration / DVB EPG / TV Epg grabber once set isn't possible. Removing all by means of pressing 'None' works, but unchecking a specific language doesn't remove it.

h4. Steps to Reproduce
1. Enter TV Server Configuration / DVB EPG / TV Epg grabber
2. Select a (or several) language(s) for which to grab EPG
3. Switch to another 'configuration page' and back and confirm that the chosen language(s) are still selected
4. Unselect the language(s)
5. Switch to another 'configuration page' and back and note that the language(s) unselected are in fact still selected

h4. Additional Information
When checking the 'epgLanguages' field in the 'setting' table of the 'mptvdb' database I notice that the language(s) are correctly added in step 2 above, but when trying to remove language(s) rather than deleting them from the field all of the previously chosen languages are written once again.