* Form styling adjustments - Move all form-related styling to _forms.less - Defined new form-related variables - Fix spinner on frontpage repo search - Add new rounded-* helpers and fix repo search radius * misc arc green tweaks Co-authored-by: zeripath <[email protected]> Co-authored-by: techknowlogick <[email protected]> Co-authored-by: Lauris BH <[email protected]>