Remove `mailto:` and `tel:` from contact cards

[TobiasDeBruijn]

Closes #319

Changes

• Remove mailto: and tel: from the contact person card
• Remove the now unnecessary <a> link.

Reasoning

The email addresses from the website are being scraped. This is not a huge problem for the board, who use a good spam filter, but it is for the confidential counselors, who are just members that use their personal email. Instead of displaying the email addresses with the mailto: property, we should display them as plain text, and split up the addresses in separate parts so crawling becomes harder.

• Decreasing spam for confidential advisors and the board due to web scraping
• I did not split the text, this looked terrible (UI).

Downsize

• You can now no longer click the link to send an email, you need to copy the address instead, in my opinion that is fine.