[Spline Chart] Some smaples in the topic are cut left/right/top

[MarielaTihova]

1. Go to this topic: https://staging.infragistics.com/products/ignite-ui-angular/angular/components/charts/types/spline-chart
2. Observe how the lines at the ends and their value points are not entirely visible
3. More specifically these samples

• https://staging.infragistics.com/angular-demos-dv/charts/data-chart/stacked-spline-chart
• https://staging.infragistics.com/angular-demos-dv/charts/data-chart/stacked-100-spline-chart

Expected result: Charts should be 100% visible
Actual result: Charts are partially cut

[MarielaTihova]

Closing as this should be resolved with this PR for xplat-examples IgniteUI/igniteui-xplat-examples#974