Cancelling the adding of an image

When selecting an image to add to an event on [event_form], we didn’t find a way to cancel the act without forfeiting all the changes to the event. There’s a checkbox to remove a picture, but the selected image still gets added.

Steps to repeat:

1. Do changes to an event on [event_form]
2. Select an image to add
3. The form doesn’t contain any Cancel button to empty the file field
4. Check “Delete Image?” checkbox
5. Submit event
6. Check event: image went to the event

Instead it should be like this:

7. When an image is selected, a Cancel button appears to empty the image field
8. “Delete Image?” checkbox is:
8.1. Renamed to “Remove existing image?”
8.2. Hidden when the event doesn’t have an image yet (eg. always when adding a new image)
8.3. Disabled, hidden or otherwise handled better when a new image is selected to replace the old one and checking the button wouldn’t have any effect.

http://wordpress.org/plugins/events-manager/