ON "Development -> Tactics", add role rating

[tiago_wakabayashi]

I would like to see added on   "Development -> Tactics" screen a info with the Role ratings, as there are position ratings for the players like this

Example:

If a defender as "ball playing defender" and "central defender" that shows the average rating playing for both roles and makes an average rating with he playing in the Defender position, picking the average rating from the both Defender roles. The role rating could be shown in own panel close the "games played in position" one or when you click on "D (C)" position shows the roles in a tree view. 

[Neil Brock]

Reviewed so locked.