Contacts 3.0.0 - #596

This is a big update of our app and a refactor of the data structure to ensure:

• Better maintainability ⛑️
• Lower level entry 👩‍🎓 👨‍🎓
• Performance boost 🚀

List of fixes

• Fix BDAY format in VCARD, missing "-" #122, BDAY format in VCARD, missing "-"
• Fix allow to enter and differentiate more than one mobile phone number, e.g for business and private use #133, allow to enter and differentiate more than one mobile phone number, e.g for business and private use
• Fix German Date Format #146, German Date Format
• several problems with birthday without a year #161, several problems with birthday without a year
• Fix Empty field property options missing #200, Empty field property options missing
• Fix FN field behaviour: first and last name #270, FN field behaviour: first and last name
• Closes Removing default name for new contact and leaving it blank #488, Removing default name for new contact and leaving it blank
• Fix Show fields for phone, email, address and groups by default for new contact #253, Show fields for phone, email, address and groups by default for new contact
• Closes Show fields for phone, email, address and groups by default  #259 Show fields for phone, email, address and groups by default
• Fix Improve the sharing view of addressbooks #293, Improve the sharing view of addressbooks
• Testing to the max 🚀  #327, Testing to the max 🚀
• Fix "undefined" group is created #337, "undefined" group is created
• Fix Display Name is overwritten by First Name / Last Name changes. #361, Display Name is overwritten by First Name / Last Name changes.
• Fix sorting order to 'first name' or 'last name' leads to strange behavior when scrolling to contacts #372, sorting order to 'first name' or 'last name' leads to strange behavior when scrolling to contacts
• Fix "/" in a user group name doesn't work #379, "/" in a user group name doesn't work
• Fix optimize the shortening and alignment of field labels #394, optimize the shortening and alignment of field labels
• Fix vCard import broken: window.localStorage is null #433, vCard import broken: window.localStorage is null
• Fix SVG not encoded or rendered correctly #468, SVG not encoded or rendered correctly
• Photo loaded only after full contact details fetched #477, Photo loaded only after full contact details fetched
  postponed because fetching the images with contactUrl?photo fails hard on the server sometimes :/
  and we need a way of knowing if the contact have a photo without downloading the photo prop
• Auto convert from vcf 2.1 while importing [$10] #492, re-add vcf 2.1 format support (in contact import function)
  Unfortunattely, ical.js does not support 2.1 yet: Support VCard 2.1 kewisch/ical.js#187. We'll see how we can manage something later. But if the lib starts being compatible, we will be as well.
• Closes please clarify which formats AND versions are supported #520, please clarify which formats AND versions are supported
• Fix Social Network types drop-down is missing "Mastodon" #545, Social Network types drop-down is missing "Mastodon"
• Fix Company contact entries don't display properly on load #547, Company contact entries don't display properly on load
• info button within the quick contact search doesn't work #557, info button within the quick contact search doesn't work
• Fix Click on a non existing contact results in a endless spinner #585 Click on a non existing contact results in a endless spinner
• Fix Inconsistent use of username when sharing an address book #592, Inconsistent use of username when sharing an address book