pub fn boot_current_theme() -> Result<Child> {
        let mut path = Self::get_config_dir()?;
        path.push("themes");
        path.push("current");
        path.push("up");
        Self::run_script(&path)
    }
Runs the 'up' script of the current theme, if there is one.

# Errors

Will error if unable to open current theme directory.
Could be caused by inadequate permissions.
leftwm-core/src/utils/child_process.rs