[accounts/ui/utils/navigation] added remove supervisee endpoint for godfather + management to block users + patched key relation for supervisee + started new endpoint to make request for supervision

[accounts] patch: on godfather validation, activate supervisee account and send confirmation email to supervisee

accounts

[accounts/navigation/settings] added Profile model to User and its related admin views and updated settings to link with user

[experiments, webapi] Bugfix: No more possible to create an experiment using an inaccessible  environment

Plotterparams merge

See merge request !222

[utils] in management/commands/install.py added default plotterparameters and extra plotterparameters

v1.2.0rc1 bugfixes

Closes #441, #393, and #460

See merge request !221

[plotters] in models updated deletable for plotterparameters with condition: if no reports are related to it