Merge branch 'release-5.1.0' of https://github.com/Sunbird-Ed/SunbirdEd-portal into release-5.1.0

* 'release-5.1.0' of https://github.com/Sunbird-Ed/SunbirdEd-portal:
  Issue ED-576: 91 number not aligned properly in the text box while updating add mobile number in the profile page
  Issue #ED-597 Portal: If new user is created via API or gmail then, Terms and policy popup content height issue with space in between
  Issue #ED-580 Desktop: Toast message is not displayed properly images are over writing in all the toast messages
  Issue ED-576: 91 number not aligned properly in the text box while updating add mobile number in the profile page
  Issue #ED-422 sass migration fix
  Issue #ED-422 sass migration fix
  Issue #ED-422 sass migration fix
  Issue #ED-422 sass migration fix
  Issue #ED-420 CSS cleanup and themes cleanup & SASS migration