Update Flask-Admin to 1.5.2 (#3036)
Update Flask-Admin to 1.5.2 (#3036)

I don't know if someone uses flask-admin but I upgraded it because of this bug:
https://github.com/flask-admin/flask-admin/issues/1588
In 1.4.2 you cant add and edit records/
getredash/redash,getredash/redash,getredash/redash,chriszs/redash,denisov-vlad/redash,chriszs/redash,alexanderlz/redash,denisov-vlad/redash,denisov-vlad/redash,chriszs/redash,alexanderlz/redash,alexanderlz/redash,chriszs/redash,denisov-vlad/redash,getredash/redash,denisov-vlad/redash,getredash/redash,alexanderlz/redash