* Add last_active_at datetime to Broadcasts table
* Add last_active_at to Broadcast index view
* Add callback to Broadcast.rb to update last_active_at
* Add a data_update script to backfill the last_active_at column on the Broadcasts table
* Add a spec for updating the last_active_at timestamp in models/broadcast_spec.rb
* Format last_active_at timestamp via strftime in index.html.erb
* Remove data_update_script: backfill_last_active_at_for_broadcasts
* Remove ActiveRecord::Dirty method from broadcast.rb
* Adjust callback in broadcast.rb and last_active_at timestamp format in index.html.erb
* Adjust time in #update_last_active_at and add the safe navigation operator to index.html.erb
* Accounts for nil last_active_at values in the view
* Uses Time.current in place of Time.zone.now
* Remove last_active_at param from Broadcasts::Controller
* Add spec to broadcasts_spec.rb to test the updated attribute via a request
* Adjust current_time in broadcasts_spec.rb
* Adjust Timecop.freeze in broadcasts_spec.rb to resolve Travis faliure (fingers crossed)
* Adjust expectation to compare against last_active_at timestamp rather than current time
* Adds Timecop back and stores last_active_at timestamp to test against
* Rename last_active_at to active_status_updated_at on Broadcasts table
- Renames last_active_at to active_status_updated_at in specs
- Renames last_active_at to active_status_updated_at in model
- Renames last_active_at to active_status_updated_at in view
- Adjusts spelling in spec descriptions
- Rewords active_status_updated_at in view to Last Active On
* Provide default crayon styles when creating banners
* Import crayons styles into /internal pages.
* Allow admins to use crayons banner styles when creating broadcasts.
* Preview banner styles with crayons.
* Use constant and helper for broadcast banner styles
* Add VALID_BANNER_STYLES frozen constant to Broadcast class.
* Add banner_style helper for determining banner style class.
* Add uniqueness validation to broadcast titles in broadcast.rb
* WIP: properly test title uniqueness in broadcast_spec.rb
* Add unique index for title and type_of on Broadcasts
* Adds a unique index to the Broadcasts table
* Adds broadcast.rb to .rubocop_todo.yml
* Resolve merge conflicts
* Add spec around duplicate broadcasts in broadcasts_spec.rb
* Adjust broadcast to be inactive in broadcasts_spec.rb
* Differentiate between welcome + announcement broadcasts
* Allow admins to filter between these two types in the `/internal/broadcasts` UI.
* Ensure that the index endpoint fetches the correct Broadcast models.
* Only allow one Announcement broadcast to be created at a time
* Also add some `announcement` and `welcome` scopes on the `Broadcast` class.
* Add flash[:success] messages in BroadcastsController.
* Add some tests for Announcement broadcast validations
* Remove unused active_announcement_params method
* Order Broadcasts by title, optimization improvements
* Fix missing closing tags in broadcast specs
