Profile settings aren`t updated immediately

[Boehrsi]

Describe the bug
If the avatar, name or status message is changed, the changes aren't always applied to the profile view.

To Reproduce
Occurrence: [often]
Steps to reproduce the behavior:

1. Go to Profile
2. Click on Edit profile
3. Change values and apply them

Expected behavior
All changes are applied to the profile view.

Additional context
This happens due to the multiple responsibilities of the user_bloc. We need to split the displaying / loading logic and the change logic to fix this problem. A new user_change_bloc should get introduced.

Internal Bug Tracker

[florianhaar]

Fixed