Fixes and improvements

A round of reliability and quality fixes across the product:

• Recording reliability is improved for candidates with poor internet connections.
• SMS: logs now show the correct error message.
• Application forms: the form now scrolls to the first invalid field on submit, including on mobile
• Date filters: fixed “is between” validation for date fields
• Removed the Hirevire install app prompt on some mobile devices
• Onboarding and upgrade page improvements