KeyManager emits key events on the composer, not the target.
Key events should be fired on composers of the activeTarget component.
Update uses of KeyComposer now that events thrown on composer rather than activeTarget.
Merge branch 'MON-109' into MON-213
Fix abstract-text-field-spec to match new KeyComposer event listener.
Merge pull request #1331 from asolove/MON-213

Update uses of KeyComposer in Montage