Visible white TrimmerView corners

[cosmicvarion]

The TrimmerView corners are square whereas the start/end handle corners are rounded. So, with a non-white background and non-white handles, points of white are visible from the underlying bar at the corners of the handles.

[blurtime]

Here my small workaround:

let trimmerView: TrimmerView = {
    let trimmer = TrimmerView()
    trimmer.layer.cornerRadius = 3 //2 should actually suffice but there was still a tiny bit visible so I set it to 3
    trimmer.layer.masksToBounds = true
    return trimmer
}()

[HHK1]

Solved, thanks @blurtime for your PR !