SMS Settings UI Refactor Checkpoint: Add General Settings
SMS Settings UI Refactor Checkpoint: Add Chat Settings
SMS Settings UI Refactor Checkpoint: Add Registration Settings
Add form validation and save to model
Just move code for better organization
Put new settings page behind the CommConnect UI feature flag
Only show custom chat template option for previewers
Merge pull request #4556 from dimagi/sms-settings-refactor

Refactor SMS Settings UI