Is it possible to force-unload an asset in editor?

I have an issue with some widgets initializing while some of their textures are not loaded yet. This causes widgets to work on incorrect texture size data, and as a result, after images load, they appear stretched (I know about ScaleBox, but it doesn’t help if the image inside it has a brush of an incorrect size).

I have ideas on how to fix the issue, but the problem is, it’s not exactly convenient to do, because this problem reproduces only once per editor session, since after a texture loads once - it doesn’t unload anymore.

Is there anything I can do to avoid having to restart the editor to unload resources?