General flow of states applied

Trello Card

Changelog

• General flow of states applied: The new status are added to the models and views.
• Fixes suggested in the review: Method names are modified, refactoring is performed and view filter is removed.
• Label button fixed and some validations removed: Method and validation are removed, and button text is modified
• Button class and set_draft function added: The "btn btn-primary" class is added to the buttons and status modification is fixed
• Table state fixed: Change of status is fixed
• Text button changed: Button text is modified