Fixed: password length not updated from the policy

In password generator, when password policy is selected, password length
did not get updated, resulting effective settings different from the
ones of the selected policy

src/ui/wxWidgets/PasswordPolicyDlg.cpp

@@ -789,6 +789,7 @@ void PasswordPolicyDlg::OnPolicynameSelection( wxCommandEvent& WXUNUSED(event) )
   m_pwUseEasyVision     = (policy.flags & PWPolicy::UseEasyVision)     == PWPolicy::UseEasyVision;
   m_pwMakePronounceable = (policy.flags & PWPolicy::MakePronounceable) == PWPolicy::MakePronounceable;
   m_Symbols             = policy.symbols.c_str();
+  m_pwdefaultlength     = policy.length;
 
   TransferDataToWindow();
 }