Edit window should close/hide when saving a new entry

[objectDisorientedProgrammer]

Related to #1

Technically this change will allow me to remove the close button from the edit window as well (in favor of the user hitting the x at the window boarder).

[objectDisorientedProgrammer]

This change would also lend nicely to combining the edit/save button since they are mutually exclusive

EditWindow.java combine save/edit button
starting around line 258

        // TODO consider combining the edit and save buttons as they are mutually exclusive.
        // Combining would reduce the clutter within the edit window.
        saveButton = new JButton("Save");
        saveButton.setEnabled(false); // disable by default until user wants to edit
        saveButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if(editable == true)
                {
                    editable = !editable; // toggle edit status
                    setEditingEntry(editable); // disable editing
                    editButton.setEnabled(true); // enable clicking 'edit' again
                    saveButton.setEnabled(false); // disable saving

                    updateDataValues(); // save changes
                }
            }
        });
        // TODO consider combining the edit and save buttons as they are mutually exclusive.
        // Combining would reduce the clutter within the edit window.
        editButton = new JButton("Edit");
        editButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if(editable == false)
                {
                    editable = !editable; // toggle edit status
                    setEditingEntry(editable); // enable editing
//                  editButton.setEnabled(false); // disable clicking 'edit' again
//                  saveButton.setEnabled(true); // allow saving
                    //frame.getContentPane().repaint(); // redraw the frame

                    editButton.setText("Save");
                }
                else
                {
                    editable = !editable; // toggle edit status
                    setEditingEntry(editable); // disable editing
//                  editButton.setEnabled(true); // enable clicking 'edit' again
//                  saveButton.setEnabled(false); // disable saving

                    updateDataValues(); // save changes
                    editButton.setText("Edit");
                }
            }
        });