* choose.cc (ChooserPage::PlaceDialog): Only skip resizing window

	* choose.cc (ChooserPage::PlaceDialog): Only skip resizing window
	in fully-unattended mode, not chooser-only mode.
	(ChooserPage::OnUnattended): Return appropriate status to run page
	or not according to kind of unattended mode.
	* choose.h (ChooserPage::OnUnattended): Remove inline implementation
	and retain prototype only.
	* main.cc (PackageManagerOption): New boolean option.
	(main): Take it into account when setting unattended_mode.
	* proppage.cc (PropertyPage::DialogProc): Use new enum type when
	setting unattended_mode.
	* state.cc (unattended_mode): Change from bool to enum attend_mode.
	* state.h (enum attend_mode): Declare new enum type.
	(unattended_mode): Update extern declaration to use it.