Ratio lock button for every width and height

[karlingermano]

Hi,
It's a small thing but could be very handy to add a ratio lock to every widt and height slider because often times you should lower resolution to avoid CUDA errors or trying to find the largest possible resolution and yet keeping your W/H ratio. A simple padlock button would prevent us using a calculator to multiply and divide the numbers all the time.
Would be great to have this!

[Verszy]

Locks for all the sliders would be a blessing whenever I'm connecting to the UI on mobile. It doesn't seem as frequent now, but maybe that's just because it's burned me enough that I'm careful, but it was pretty frequent that accidentally I'd max out res, CFG, or steps just trying to get down to the results.