Improved guardian related pages

We've done some redesigns to the UI to help make it easier for teachers to manage student's guardian data and to make sure that guardians have proper access to their children's data through Obserfy.

Guardians without email are now highlighted on the UI. Since guardians will be given access to their children's data using their email address, this will help to make sure that all guardians have their emails properly set.

You can now also go see and edit the guardian's data directly from the student's profile page by clicking the guardian's row you want to navigate to.

Now the page is more compact and shows more data to give a better overview at a glance.

Guardian's profile page now shows the list of related students that you've assigned to them.

You can now also properly delete the guardian's data using the delete button on their profile page. This will completely remove their access and data from the database. Data of related students will stay intact.