We've re-done media uploading and management.
Paid users have always been able to upload images to include on their cards but we've improved how this looks and works.
- you can now upload and use media on your general stream
- you can delete images not in use and can see which cards are using which images (just click on used by X cards)
- the list of media is more neatly presented and is in a collapsible panel
- you can drag your images directly on to the text area and the markdown will be inserted on drop (this works for editing existing cards as well as new cards)