Customised installation icons preserved

It is possible to customise the installation icon but the change is not maintained when the application is reloaded. I chiefly play modded Minecraft so often the default-available tiles don't fit the theme of the pack e.g. technology, magic, trains so I'm stuck with it defaulting to the furnace.

I would like to be able to customise it so that every time I load this pack it shows the desired icon ⚙️

Just cosmetic but it's nice.

Thanks