Better description of grouping in active liveviews

[kraleppa]

So in active LiveViews view we are grouping LiveViews by window in which they're displayed. To achieve that we use transport pid and we display it as the group name. It may be pretty misleading for user what this ID is and it may not be clear that each group represents a separate browser window.

We might want to give a better description or change group name or identificator

[kraleppa]

Discover options to give user an easy way to identify given browser window - e.g. notification in the browser card