'kendoRendered' event is received only by the last rendered widget's parents

[AkosLukacs]

$emit dispatches the event "upwards", so if the last rendered widget is deep in some tree structure, any listeners that are not parent of that widget, won't get kendoRendered event at all.
Broadcasting from $rootscope solves this.

[AkosLukacs]

A demonstration is here: http://plnkr.co/edit/Q2wq0KILDC7jSfjAhInx?p=preview
(watch the console)
Expected behaviour: you can listen for 'kendoRendered' anywhere, and actually get the event
Actual behaviour: only the parent(s) of the last rendered widget get the event
right now, only 'otherCtrl' receives the event
if I remove 'otherTreeView' from the dom, 'dummyCtrl' does receive the event, but the other does not

[petyosi]

the kendoRendered event was a bad idea, in general. It took us a while to figure it out, though. One will benefit much more from a widget init event — #1226. The implementation itself is quite trivial, but we need to update 70+ API reference pages so that the event propagates to the server-side wrappers.