Sign-up email visual bug

[ZuzanaOdstrcilova]

Describe the bug
We realized there is a visual bug in the sign-up email. It doesn't look professional enough.

• The link to verify is in a long not, not-nice form
• The logo is not sharp, sometimes even bigger and pixelated
  Probably, it can be in other email templates, too, and it would be nice to check all of them.

Screenshots

The gray rectangle is just for hidding the data on the screenshots

To Reproduce
Steps to reproduce the behavior:

1. Sign up
2. Open the email
3. Open the logo in another tab
4. See pixelization of logo

Expected behavior

• The link in the email would be nice to have in a better short form like:
  

• Logo should be sharp, in the good quality. In the e-mail in the same small size as it is now.