Sample app testing and updates to 17.2.x

[hanastasov]

Upgrade and re-test the following apps to 17.1.x

Test CRM and FinJS (live-demo) grids with the new version in the sample browser. Consider not only an upgrade of the whole samples browser but introducing new functionalities/enhancements based on the new features introduced with the new version.

All client app part of the https://github.com/IgniteUI/ASP.NET-Core-Samples/ repository

Perform Grid performance testing and smoke testing of the following demos:

Live-data update grid sample part of the Angular samples
Virtualization and performance sample
SignalR application
Server-side rendering testing - topic
*Ensure there aren't any visual inconsistencies
*No performance hit
*No behavior changes (unless intentional)