Kevin Ansfield 9993f02ffa 🎨 Added ability to drop an image card onto an empty gallery ... closes https://github.com/TryGhost/Team/issues/1013 Image cards could be dropped into a gallery when at least one image was already present but there was no handling for image cards being dropped onto an empty gallery. - added `data-gallery` attribute to the placeholder element so it gets picked up by the drag-and-drop container registration - added drag enter/leave event handlers so we can show the same dropzone indicator as when a standard file is being dropped onto an empty gallery - updated the drop handling to handle insertion when no images already exist by forcing insertion at index `0` - updated the register or refresh handler to switch between different drag-and-drop container elements as needed and switched to `scheduleOnce` to prevent duplicate containers being created if the function is called twice before render occurs		2021-09-06 11:57:42 +01:00
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admin	🎨 Added ability to drop an image card onto an empty gallery	2021-09-06 11:57:42 +01:00