* use hash to search widget name.
* use eina_stringshare correctly
* do edje_file_collection_list_free correctly. now it frees 'frame' from the list when this api is called. weird..
* fix preview object align issue.
* adopt scroller for preview object if needed.
* implement open, code, about popup.

* not implemented :
	calendar, conformant, ctxpopup, datetime, dayselector, diskselector, hover,
	map, notify, panes, photocam, scroller, segment control, slideshow, video
* needs to be fixed :
	colorselector, panel, player, separator, slider

* [widget]
	popup : item content support.