Feature request: for advanced options, use text inputs

I'm of the opinion that advanced options should help empower those wanting to do advanced things.

To help support that, I think that the drop down menus used in the "Advanced options" menu of the "Text to image" tab should let me just write the values in. Not only is it easier to type 6 in the box, I also don't need to scroll through a list of numbers to find the number 6. And if I want my "Guidence Scale" (there's a typo in the drop down title, by the way) to be 6.3, well, there's no way to indicate that.

Though free-form option values can cause unexpected behavior, I think that unexpected behavior is totally acceptable. If I'm given the power to break stuff, then I should expect to see stuff break. I consider it a small price to pay to be able to type in `6.3` when I want to use `6.3` as my guidance scale value.