Refactor password changing

* Move showing passive notifications out of RegistrationManager
* RegistrationManager: Move signal calls
3 jobs for refactor/password-changing in 5 minutes and 17 seconds (queued for 2 minutes and 45 seconds)
Status Job ID Name Coverage
  Test
passed #69227
build

00:02:00

passed #69225
clazy

00:02:47

passed #69226
qmllint

00:00:29