Add support for adaptive height when using layer shell mode

[Aleksanaa]

Rofi has a fixed-height: false option to make the height adaptive, which means when typing to search something, the height of the window gets smaller as candidates shrink, leaving no blank space between last candidate and the bottom. Is it possible to also implement this feature in yofi?

[l4l]

For the centered window auto-resize implies "jumping" which should be really annoying.

In general it's not really hard to implement and I'd rather prefer height = "auto" instead of separate option.

[Aleksanaa]

You mean jumping is resizing with no animations? Anyway I'm more annoyed by blank spaces. An implementation in any means would be appreciated.

[l4l]

Yeah, instant resizing without animation will look terrible. A possible workaround for this one is to have a fixed window offset (window_offsets option) but it still won't be smooth

[NullVoxPopuli]

if the top border is fixed, the jumping isn't so bad, and can be smoothed