Adjusted CSS and added default notification options in the environment config files

config/environment.default.js

src/app/app.module.ts

...ed/notifications/notification/notification.component.html

...ed/notifications/notification/notification.component.scss

...ns/notifications-board/notifications-board.component.html

...ns/notifications-board/notifications-board.component.scss

...ions/notifications-board/notifications-board.component.ts

src/app/shared/notifications/notifications.service.ts

src/config/notifications-config.interfaces.ts