Update Connection screen

The design slightly changed, see attached figma screenshots:

• add a second button that will allow to change the exit gate's country

• tweak switch design for protect all apps feature

• add another settings option: 'Connect directly to tor' (I need clarification what feature this setting represents)

• ensure onboarding dialog looks the same as in the figma screenshot and is only shown on first use.

• subsequent screens for exit selection and the new connection screen will be implemented in separate issues.