* TagsController inherits from ApiController
* Let ApiController inherit from ActionController::Base to have its own lifecycle
* Remove unused method
* Use only one respond_to :json for the entire API
* ApiController inherits from ActionController::Base
* Use Pundit only where needed
* Improve a few idioms with their faster counterparts
* Remove unused routes and some dead code
* Add the option to use bullet in testing mode and move rack host redirect
* Go back to the classic fetch to make mocking work
* Reorder gems and fix code climate issue
* Set default styles and move button style out of form
* Add MVP of Preact /settings/integrations
* Change background color on hover and focus
* Remove unused constructor
* Improve optimistic rendering
* Add display name
* Use loading indicator for optimistic rendering
* WIP test
* Add basic snapshot tests
