Bumped to latest parent pom

Increased pom-imagej version to 2.37
TextEditor: add CloseConfirmable implementation

This will allow TextEditor windows with unsaved changes to prompt users
to deal with their changes during close operations.
TextEditor: remove windowClosed listener

There is no need to listen to windowClosed events in light of the new
CloseConfirmable paradigm.
Merge branch 'confirm-editor-close'

Update the TextEditor to implement CloseConfirmable, opting in to the new
close-with-confirmation paradigm.