Improve Custom Tooltip .NET

[joadan]

Now when apexcharts/apexcharts.js#4869 has been implemented we should investigate if we can improve the .Net custom tooltip. With this change we should be able generate the tooltip without relying on the mouse over event to trigger the tooltip generation.

[joadan]

Breaking Change

The .Net Tooltip now uses the apexcharts.js tooltip function.
The syntax is the same but the tooltip is generated in the apexcharts tooltip container with the apexcharts.js css.
Also we no longer rely on the event 'OnPointEnterEvent' and therefore we don't need to automatically add markers to line charts.
Check https://apexcharts.github.io/Blazor-ApexCharts/features/tooltip-dotnet for samples

[joadan]

fixed in v5.0.0