PasswordsettingsAction aligned with FormAction

Also made some changes in the password "munging" function call
common_munge_password to accept a profile instead of user ID (which
was only there because stoneage StatusNet used the ID to generate a
not-very-random salt, but nowadays we primarily use AuthCrypt plugin).

classes/User.php

@@ -299,7 +299,7 @@ class User extends Managed_DataObject
             }
 
             if (!empty($password)) { // may not have a password for OpenID users
-                $user->password = common_munge_password($password, $id);
+                $user->password = common_munge_password($password);
             }
 
             $result = $user->insert();
@@ -1015,6 +1015,11 @@ class User extends Managed_DataObject
         return $this->getProfile()->isPrivateStream();
     }
 
+    public function hasPassword()
+    {
+        return !empty($this->password);
+    }
+
     public function delPref($namespace, $topic)
     {
         return $this->getProfile()->delPref($namespace, $topic);