TextEditingArea and its interfaces were moved back to the view package because it seemed more appropriate for them to be there than the model package, where they seemed to add unnecessary bloat.

Also, since #630 refers a developer to the interfaces despite some of the public methods in GenericStyledArea not being declared or documented in TextEditingArea or one of its interfaces, these methods are now declared and documented in those places and overridden in GenericStyledArea.

Since two event classes were already in the util package, and a third event class was still in the view package, these were moved to a new event package where it seemed more logical to put them there and also removes a little bloat in the view package. This leaves the util package open for additional utility classes in the future.

Lastly, _position() comes from #213 but has never been renamed to distinguish its functionality from position(). Since it only calls navigator.position(), which is itself confusing due to the other "navigators" that appear throughout the code or its dependencies, this was renamed to a clearer name. I also removed the middle-man-like method since it's only usage is in currentLine().