Creates a new empty list
Opens an existing list
Re-loads the named recently loaded file
Saves the current list
Saves the current list with a new filename
Prints the contents of the current list of items
Prints the contents of the current list of items
Quits the application
Selects all items
Unselects all items
Adds a new item
Creates a new category
Checks the currently selected items
Unchecks the currently selected items
Toggles the checked state of the currently selected items
Copy selected items to one or more categories.
Remove selected items from the current category
Removes any filters from the list
Filters the list to only show checked items
Filters the list to only show unchecked items