A lot of properties not copies in `copyWithZone`

* [x] I've read, understood, and done my best to follow the [*CONTRIBUTING guidelines](https://github.com/jjatie/Charts/blob/master/CONTRIBUTING.md).

## What did you do?

I copied dataSets

## What did you expect to happen?

the properties should be the same with old dataSets

## What happened instead?

Some properties are not copied. the chart displays different
For example
`LineRadarChartDataSet` : `lineWidth`
`ChartBaseDataSet`: `drawValuesEnabled`, `visible`

## Charts Environment

**Charts version/Branch/Commit Number:**
**Xcode version:*9.3*
**Swift version:*4.0*
**Platform(s) running Charts:**
**macOS version running Xcode:**