Fix UI and Standby bugs
This MR addresses the following bugs:
- Standby page showing 'Taking too long dialog' when Ouinet client is stopping. Now, it will display 'Restarting' until the Ouinet client status 'Starting' and then it will display the appropriate text.
- Text and button overlapping on onboarding screen for small devices
- Text and progress indicator overlapping on shutdown screen for small devices