BG and logo can be added by dragging image file from explorer/finder to preview image, added drag and drop to add one or multiple images to a page, added functionality to delete all images from a page, images in scrollable image view of a page now passed in by reference as list, modifying in scrollable image view affecting data source as well.
Changed scrollable image view for editor panel now fixed to one row, added resorting by dragging image one position up or down, added deletion of image by dragging it out of the preview, minor fix in main panel.