Add file names to model and texture menu

[Lizband]

Currently it's hard to tell model apart if the preview image is at an awkward angle. For example if the model is a plane, the model isn't visible in the preview. Adding the file name to the bottom of each of the object buttons would make asset browsing easier.
(I attached a mock-up image, sorry it's a bit silly looking)

[deadcast2]

Hi Lizband! Thank you for reporting these issues. This feature seems like a really nice idea. Glad you're continuing to use UltraEd and finding more areas where it can be improved. The mock up looks great and I'll start thinking how I'd go about implementing this. Thanks for reporting the other issues as well and I'll take a look at those too. I was trying to figure out how editor's like Unity take care when the model being imported is flat. They have some algorithm that figures out how to orient the model so it's always visible in the preview.

[Lizband]

Not a problem. Thank you so much for all of your work on this project!