Resizeable thumbnails / preview images in Project Window

It would be great if the asset thumbnail in the top left corner of the Project Window would be scalable, or even better draggable to any custom location and size. It's quite impossible to make out any detailed visual information from the tiny image.

Below is an example of me going through a set of hundreds of generically titled images from a photo shoot, trying to find the best expressions and poses for the job: