The settings modal should be changed to a settings page

[pinterid]

Is your feature request related to a problem? Please describe.
Currently the user settings are modified within a modal, for changing a profile picture another modal is required, but React does not support the handling of 2 modals at the same time.

Describe the solution you'd like
The settings modal should be rebuild as a settings page.

Additional context
Ref: react-native-modal/react-native-modal#30