(1) The GUI currently behaves such that if MinTip is set, MinSuper will be ineffective. However, Commentron actually checks MinSuper first. Just zero out MinSuper for now to enforce our desired behavior.
(2) Add debouncing to numerical settings. Refresh everything during onBlur to always reflect what's in server (e.g. in case there was an error).
To avoid calling `setting.Get` excessively, we'll fetch the latest settings one last time before sending a tip. We'll also fetch in several areas, like when a comment action fails (most likely creator just enforced a minimum).
This will be easier when websocket send an update.
## General
- `setting.List`: returns full creator settings. Requires signature (i.e. you own the channel)
- `setting.Get`: returns a public subset of the creator settings. No signature required, and it is mainly used by the GUI to determine the constraints of a channel (e.g. comments enabled? min tip requirements? etc.). Does not include private settings like "blocked words list".
`doFetchCreatorSettings` will handle both of these. Clients that uses the stashed results (`settingsByChannelId`) just needs to be aware the result might not contain everything, depending on whether you own the channel or not.
## Misc Related Changes
- Finally fix the reducer for COMMENT_FETCH_SETTINGS_COMPLETED to not purge the data on each call.
- Change `doFetchCreatorSettings` to operate on a single channel instead of multiple. We ended up not using the multple mode anyway, so it was wasteful code trying to batch the promises.
- `commentsDisabledChannelIds` is no longer needed. Previously, this was created just to differentiate between Creator (full) and Channel (subset) settings. It's cleaner to just use one object, so eliminated this.
- Remove unused 'commentingEnabled'.
## Aside
- There are now 2 ways to know if a channel has disabled comments: (1) from `comment.list` and `setting.Get|List`. Both of them updates `settingsByChannelId`, so it'll still be a single place for the GUI to check against.
