Make authManger() in UserPanel configurable.

[jafaripur]

make authManager configurable for user panel when application use another components id instread default authManager.

Q	A
Is bugfix?	✔️
New feature?	✔️
Breaks BC?	❌
Tests pass?	✔️
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[samdark]

@jafaripur would you please add a line for CHANGELOG?

[bizley]

how about this, can be change to:

$authManger = Yii::$app->get($this->module->authManager, false);

Yes, I think this is good idea.

[samdark]

Thank you!