**Description**

The "lots of circles" error page is very rough via Remote Desktop connections. In the current global pandemic many people are working remotely via already constrained connections. Needless redraws caused by the highly animated circles can cause frustrating slowdowns and sometimes lost connections.

**Use case / motivation**

It should be trivially simple to disable the animated portion of the error page and instead use a standard error page. Ideally this would be something easily achievable via configuration options and exposed in the Helm chart.

**Related Issues**

N/A

airflow/www/extensions/init_views.py
"""Initializes connection form"""
    lazy_add_provider_discovered_options_to_connection_form()
def init_error_handlers(app: Flask):
    """Add custom errors handlers"""
    from airflow.www import views
    app.register_error_handler(500, views.show_traceback)
    app.register_error_handler(404, views.circles)
def set_cors_headers_on_response(response):
    """Add response headers"""
    allow_headers = conf.get('api', 'access_control_allow_headers')
    allow_methods = conf.get('api', 'access_control_allow_methods')
    allow_origin = conf.get('api', 'access_control_allow_origin')
    if allow_headers is not None:
        response.headers['Access-Control-Allow-Headers'] = allow_headers
    if allow_methods is not None:
        response.headers['Access-Control-Allow-Methods'] = allow_methods
    if allow_origin is not None:
        response.headers['Access-Control-Allow-Origin'] = allow_origin
    return response
def init_api_connexion(app: Flask) -> None: