Be able to navigate process using standard browser navigation

[nikku]

Is your feature request related to a problem? Please describe

With browsers, IDEs and other tools I'm used to a smooth navigation in the diagram / in and out of scopes via MODIFIER + arrow keys. On an app like the BPMN.io demo, Web Modeler or Camunda Modeler I'd assume that such navigation is supported, too.

Describe the solution you'd like

• Navigation forward and backwards in the diagram hierarchy is possible via ALT + arrow keys (Chrome, Sublime Text style)

Describe alternatives you've considered

Do not hook navigation in the diagram. Users need to use the mouse.

Additional context

ALT + arrow keys is the standard shortcut for navigating back and forth in your history in Chrome (Linux) and Sublime Text.

[nikku]

For context, setting and retrieving plane from a link is already done in Camunda Cockpit:

Setting of Plane from link:
https://github.com/camunda/camunda-bpm-platform/blob/01049cc462bd8790de70ef8bfe0ae[…]da-commons-ui/lib/widgets/bpmn-viewer/cam-widget-bpmn-viewer.js

Storing the Plane:
https://github.com/camunda/camunda-bpm-platform/blob/01049cc462bd8790de70ef8bfe0ae[…]da-commons-ui/lib/widgets/bpmn-viewer/cam-widget-bpmn-viewer.js