Fix image upload dismiss
minor
EditQuest: image size (wip)
Fix image upload dismiss fix
Remove inappropriate "aria-hidden" attribute
Change fix of wmd background pane (worked only once, not when opening image upload dialog several times)
Minor
Image Upload: add error message
EditQuest: on load state of visibility and license agreement
EditQuest: image size
Image upload: improve
EditQuest: minor
Image Upload: Store image $.post() > $.ajax()