Triggering "remove" event in the edittoolbar widget

If the widget interacting with the edittoolbar widget does not feature a "remove" method,
the edittoolbar will trigger a "remove" event. Consequently, there is no need to implement
a "remove" method in the interaction widget.

Change-Id: I4194df1cd2380364597d939686dfcc8eae7f0b61
Merge "Triggering "remove" event in the edittoolbar widget"