Removed __continueStopEditing flag

Event listeners are attached dynamically instead of using
a flag to determine how to continue event handling.

Change-Id: I8b7973fadd0e26ab29902e72a1fafb966a89d53f
Removed direct use of _trigger from edittoolbar widget

Change-Id: I3ed4b8a0511398f2b0a2c98734b0414a7dad095b
Merge "Removed __continueStopEditing flag"
Merge "Removed direct use of _trigger from edittoolbar widget"