Improve heroes list

[Bernhard Jung]

The list needs to be able to group heroes in partys and ways to sort and filter it.

[Bernhard Jung]

A small change is that it is now sorted by name. sorting happens only once when the application is started.

[Bernhard Jung]

I put the list on an new page and added more information like the AP of the hero and the Profession. It could still look nicer.

[Bernhard Jung]

Ich removed the list view and replaced it with a widget that contains a nicer looking widget for every hero.

[Nando Neck]

some kind of folder structure would also be helpful to organize heros