Prevent -textViewDidChangeSelection: from being called while text is changing. AppKit sends the selection change notification both when text is actually changing and when the cursor/selection is changed without adding/removing text. UIKit only sends -textViewDidChangeSelection: when the actual selection or insertion point is changed directly and not as a consequence of text entry.
Prevent -textViewDidChangeSelection: from being called while text is changing. AppKit sends the selection change notification both when text is actually changing and when the cursor/selection is changed without adding/removing text. UIKit only sends -textViewDidChangeSelection: when the actual selection or insertion point is changed directly and not as a consequence of text entry.

git-svn-id: bd932d20d2c32fb1124b4590cfef0a39e17bad6e@5444 d3437ac4-8b1b-0410-be28-b75ab53cb89f

jterhorst/Chameleon