Feature: Show only temperatures

Currently, as far as I can tell, there is no way to display CPU or GPU temperature without also displaying the usage/load percentage. In other words, cpu_temp and gpu_temp don't do anything unless also using cpu_stats and gpu_stats, respectively, each of which causes MangoHud to show a percentage.

I'd like to be able to show only temperatures, for two reasons:

1. Frankly, I really don't care about the CPU/GPU usage as a percentage. What I want to know is whether my hardware is running too hot. Generally one thing will correlate to the other, but the temperature is what I'd rather see at a glance, and that would be easier with fewer numbers.
2. MangoHud can't even get the GPU usage in one of my PCs (which has a Radeon HD 7950, and based on information in bug reports like #233, I've always assumed there's no fix for that). But MangoHud can measure the temperature of this GPU, which is what I really want to see anyway. Having to see GPU usage stuck at 0% in order to see the temperature is just a bit annoying, especially when I don't really care to see the usage anyway. I'd rather just hide it. I know this is an extremely specific situation, but I'm sure I'm not the only one with a card for which MangoHud can see temperature and not usage.