Feature/enhancement description:

When exporting a png image of a texture, it would be awesome if the save file dialogue box auto-filled in the name of the working ptex file and resolution in the file name field, ie "file name-resolution.png" or "file name_(resolution).png".

For example, when I create a new Material Maker file I copy my own template.ptex and rename it as a date-time stamp (eg 230721-144457.ptex). When I go to export my finished texture, the save file dialogue box has already auto-filled in a different file name (I'm not sure where it's getting that name from). And since I export different resolutions (sometimes for the same texture) I have to manually remove the incorrect file name and type in the correct file name and append the resolution each time (eg 230721-144457-512.png).