Get the statistics of a pattern

# Get the statistics of a pattern

## Context

For the moment, when you filter problems with a given pattern on the Problem Detail screen, you don't have detailed statistics.

## Expected

On the Problem Detail screen, when the user click on a specific pattern for a problem with several patterns, then display the statistics for this specific pattern :
* Errors
* Scenario
* Branch
* Release
* Version
* Countries
* Types
* Platforms

Start with the Problem Detail screen and trace the existing pattern-filtering and statistics display entry points. Done means selecting a specific pattern for a problem with several patterns displays its Errors, Scenario, Branch, Release, Version, Countries, Types, and Platforms statistics.

Written by the indexing model from the issue text.