Module should expose Tabled library options on config page

@bronzehedwick this is great! thanks for adding it, I think it will be very useful.

The code changes look great, however it needs a hook_update_N() → for setting up the configuration settings for existing installations, I tested it on a site that's already using the modules and the default settings are null. See attachments.

@bronzehedwick the hook update is setting up large_character_threshold and small_character_threshold however everywhere else in the code is using large_character_theshold which has a typo, so the config is never read. The config field label has a typo too.

Looks good to me!