Go back button properties
| BackgroundColor | The background color, which is used to paint the area behind the button text. |
| Enabled | Whether the button is enabled. |
| ForegroundColor | The foreground color, which is used to paint the label. |
| Label | The label. |
| Name | The name, as assigned in Calcapp Creator. |
| Reference | A reference to the go back button. |
| Target | The screen that the user is moved backward to when the button is pressed. |
| Visible | Whether the button is visible. |