Replace all the "{href}" placeholders in verify email template

[aitoraznar]

Hello,

I needed to send an email with the link in a button and an alternative link in plain text.
So I used a regex to replace all the "{href}" placeholders in verify email template.

Regards

[slnode]

Can one of the admins verify this patch? To accept patch and trigger a build add comment ".ok\W+to\W+test."

[loay]

Can you please keep the commit message to 50 characters or less.
Also, do you mind adding a quick unit test to catch any future regression? Thanks

[aitoraznar]

Ok, I''ll do

[superkhau]

Closing as duplicate of #2310 (already merged). If you feel the m modifier for regex is necessary, please submit another PR and I will get it merged in right away. Thanks for the contribution! ;)