* refactors team views
* split views.py into users.py and teams.py in users app
* refactors method headers for _user_has_permission()
* adds method and class comments and documentation to base view classes
* extends BaseModalFormView to hold general logic for processing GET and POST requests for BaseModalForm endpoints
* refactors uuid check to use a specific parameter instead of kwargs
* fixes css bug where modal form input elements would not be visible
* refactors check view for intervention from function to class
* refactors DeductionViews to inherit from extended BaseModalFormView
