InputListener change event for Editor does not pass column to handler

[schallm]

The column variable is not provided when calling _handleEditorChange in the main InputHandler within Editor.js (version 0.4):

this.on('change', function (evt) {
     self._handleEditorChange(evt);
});

The column is already available and is passed in the IE specific events. It should look like the following:

this.on('change', function (evt) {
     self._handleEditorChange(evt, column);
});

[kfranqueiro]

This won't actually work, because this code registers a single delegated event listener for the entire grid - not one per column. The old-IE case is special in that it is registering event handlers on each individual input.

The code in _handleEditorChange already looks up the column itself from the event target, so the old-IE branch passing column is really just a shortcut to avoid that overhead when it's already known.