Force app to use GL backend

[drtheodor]

Is there a way I can force Slint to use GL backend(instead of including both - qt and gl include only gl, to make binary size smaller)?

[ogoffart]

With features flags. In Cargo.toml it would look like

slint = { version="0.2", default-features=false, features = ["backend-gl-all", "compat-0-2-0"]}