Switch button is visible to players

[Odoamar]

The new feature #112 was incorrectly implemented in one place. Players have the possibility to switch "Visible to Players" button in their Careers, which causes a crush app.

Steps to reproduce:

1. Open App as Player
2. Go to Character Attributes
3. Go to Carrers
4. Switch "Visible to Players" button

Result: The Application stops working

[Odoamar]

@fmasa Could you give me permission to add labels while creating a discussion? Or is it restricted to the repository owner?

Today I will take a second phone to recheck other places if you want.