UI Fix: Priority lists do not filter todos on priority

[Varun487]

In the second, third and fourth forms in the index.html file, all todos are listed indiscriminately without the priority of the todo objects taken into account.
Steps to solve this issue:

1. Filter todos according to their priority.
2. In the form, Add action and method attributes to the below form. The form makes a post request to delete/id to delete the todo from the Database.
3. Add csrf_token for each form for security.
4. Add title, content, priority, timestamp and a submit button to each of the priority list forms.

[sawyer1997]

@Varun487 may I try?