Event emitted when toggle is clicked

[binaryfog]

Needed for rearrange the parent element.
For example , using read more directive inside a widget managed by masonry . When read More is clicked the widget's height will grow and masonry needs to be called to rearrange the widgets .

Thanks,
Catalin

[lfbn]

Hi. Created a WIP PR to have this.

[ismarslomic]

@lfbn see my comment in PR