Close live connections from the model on any password change

The sessions end wherever the password changes, but only the profile
page closed the live connections, so a change from a console left a
signed-out device receiving messages until it dropped. Close them after
commit from User, logging rather than failing if the realtime service
can't be reached, since the password is saved by then.

From #371.

(cherry picked from commit c6e0105491)

app/controllers/users/profiles_controller.rb

@@ -8,8 +8,6 @@ class Users::ProfilesController < ApplicationController
 
   def update
     @user.update user_params
-    disconnect_remote_connections if @user.saved_change_to_password_digest?
-
     redirect_to user_profile_url, notice: update_notice
   end