Vitaly Slobodin authored Sep 18, 2019 and James Lopez committed Sep 18, 2019

This commit introduces a new Sign In / Sign Up form for trials.
It behaves almost like the original with some exceptions:
- removed ability to sign in via social networks;
- removed captcha on the sign in form;
- field 'name' replaced by two new fields 'first_name' and 'last_name';