[enhancement]: Add a button for uploading images into assets as an alternative to drag&drop

[asagi4]

Is there an existing issue for this?

• [X] I have searched the existing issues

Contact Details

No response

What should this feature add?

There should be an alternative to dragging and dropping images into invokeai. Currently the only way to do it seems to be rather well hidden.

On my system, drag and drop is completely broken; now, I don't consider that an invokeai bug (it's probably because I have a weird Linux system), but even if it did work, I would prefer to just be able to open a file upload dialog to upload images, because most of the time I don't have a file browser open to drag images from.

Alternatives

There is a workaround; you can upload images by creating a control layer, uploading an image into it, and then creating a raster layer from it. I don't think it's very good UX though, and without that workaround I think I would be completely unable to use InvokeAI.

Additional Content

This is somewhat related to #6840