The user can create and save a Blog Category or Blog Tag without a Title

[sabina-talipova]

Description

When a user creates a blog, in the Categorisation tab he can add a Blog Category or Blog Tag without a title and then save empty values.

AC's

• Validation that the Title field in Tag / Category is valid at the time the blog post is saved is added;
• Tests checking that these fields are not empty are added;