GPU Weights Reset to Max After Reloading the UI

[toyssamurai]

After reloading the UI, the GPU Weights slider always resets to Max.

Also, I think a better way to handle GPU Weights is to use a percentage value, and may be a max/min MB input box (in the Settings tab?) People who are using Cloud GPU may not always use the same GPU, setting the GPU Weights to a fixed value is very inconvenient.