FlowAuth admin can't reset existing user's password

[jc-harrison]

Describe the bug

If I log into FlowAuth as an admin user, edit an existing user, and try to reset the user's password, I get re-directed to the login screen and the changes don't take effect (no error message is shown).

To Reproduce

1. Spin up FlowAuth in demo mode, and log in as 'TEST_ADMIN'.
2. Select the 'Users' tab, and edit 'TEST_USER'.
3. In the password box, click the password reset icon.
4. Select 'Save'.
5. The login screen appears.
6. Try logging in as 'TEST_USER' - the password has not changed.

Expected behaviour

Admin users should be able to reset other users' passwords through the FlowAuth UI.

[greenape]

Presumably there's an error happening on the backend - traceback from the flask app?

[jc-harrison]

[2019-12-02 11:43:49,593] ERROR in app: Exception on /admin/users/1 [PATCH]
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/usr/local/lib/python3.6/site-packages/flask_login/utils.py", line 261, in decorated_view
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/flask_principal.py", line 199, in _decorated
    rv = f(*args, **kw)
  File "/usr/local/lib/python3.6/site-packages/flowauth/admin.py", line 714, in edit_user
    if len(edits["password"]) > 0:
TypeError: object of type 'bool' has no len()

[jc-harrison]

Looks like

FlowKit/flowauth/frontend/src/UserAdminDetails.jsx

Line 146 in d3ef12d

password ? password.length > 0 : undefined,

is causing the problem