Evolution of Policy block suggestion mechanism

### Problem description
Current algorithm for block suggestions proposes a block and the user can either accept it or not. This is somewhat limited, multiple enhancements can be made (see below).

### Requirements

- Make the suggestion mechanism to propose multiple priorities options, from which the user may chose one or none.
- Add some indication on how frequently this pattern appear in the policies used for suggestions. E.g. this block follows that block 75% of the time.

### Definition of done

- Functionality is implemented as per above
- Documentation updated accordingly

### Acceptance criteria
Policy block suggestion mechanism can propose multiple options as per the description above