update for latest bootstrap version

[Grnd365]

This version seems based on bootstrap 5 beta. Using latest version of bootstrap, for example the Large Hierarchy Navigation Demo will not load correctly. Is there an update planned for a more recent version (non beta) of bootstrap 5?

[BasicPrimitives]

It is nearly impossible to create nice demos without using popular frameworks. The majority of our samples do not depend on any frameworks and rely solely on JavaScript and the DOM. We will update them to the latest version of Bootstrap.