Close marker with click in the marker

## What did you do?

I use a custom marker that I created with XIB file ( view, label, image..) and I insert in the line chart and all is good

## What did you expect to happen?
I need to close the marker with the close button

## What happened instead?

every time I try to close the marker, it show a new marker with the new position, only the last marker it close fine

## Charts Environment

**Charts version/Branch/Commit Number: 3.4.0
**Xcode version: 11.3.1
**Swift version: 5
**macOS version running Xcode: 10.14.6

Reproduce the issue with a custom XIB marker in a line chart using Charts 3.4.0, then trace how marker taps and close-button taps are handled. Done means tapping the close button removes the current marker without creating or repositioning another marker.

Written by the indexing model from the issue text.