Give TextEditorActionHandler an explicit parent and unify usage.
The action handler implicitly passed ownership to ICore, which is non- to the action handler. We now consistently create the action handler in the editor factory, give ownership to the editor factory, and don't hold a reference to it. Change-Id: I4372f8de966e3ceff87c06c5528c6b54522c1d57 Reviewed-by: David Schulz <email@example.com>
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