Register Form Accessibility

[merzouka]

Add register form indicators for easier navigation:

• show step in form
• make previous button more visible
• save form state on backward navigation
• fix calendar weird value disappearing on click
  
• fix select changing color when navigating back
  
• fix weird multiselect behaviour for province selection after the register failing and navigating to previous step and back:
  • the value of the province is set but yet the city is showing no cities as if it was not selected
  • even after reselecting the province the issue is not fixed
  • the value of the city is reset on renavigation
• add appropriate error message on duplicate email

[merzouka]

Currently Fixed

• the multi select issues
• appropriate error on duplicate email

the calendar issue is related to the whole library