Add function to remove tree items marked for deletion from the user interface after successful commit.
Update comment descriptions of removeMarkedForDeletionItems.
Move listener for Request Tree View selection changes to named inner class instead of anonymous inner class.  This will make it easier to find and work with.
Change the default width of the main view to be 800px.
Change the tree view font size for the text cells to 11 from 10.
Add printing node fxml stub.
Add printing utils code from Rakesh Menon's examples.
Add printing stubs to context menus of request tree fxml.
Add printing handling action handlers to request controller
Change the font for the printing node css.
Add print requests function to take a list of request objects and dynamically come up with a scene graph that can be converted to an image and then printed.