Refactor: Config#config -> Config#fl_config
Add JSON API for changing config by section
Vue-ify setting display
Hide components until initial JSON loading finished
CRUD for each setting section
Error handling
Add test
Refactor spec helpers
Add spec for delete button clicked then cancel clicked
Reload after delete section to fix id mismatched
Fix text: terms.update -> terms.save
Merge pull request #105 from fluent/setting_component

Setting component