[Feature Request] Image size setting for previews #672
Description
Had a search around and couldn't find how to do it (or any suggestions for it).
I think it might be useful/nice to be able to specify the size of the preview image shown on the gallery and image uploader - right now I think they just use the default thumbnail at 150x150. Presumably you'd just use an existing image size which has already registered in WordPress, although I guess there'd have to be a fallback for images where that size is unavailable due to the image's actual size, or that it hasn't been processed for that size by WordPress.
Overall I think this would be useful for cases where a 150x150 thumbnail doesn't really represent what will be shown on the front end, objects such as a slider or full width image may typically preview an image more relative to their size, or at least something with the same aspect ratio.