Calculates the NavBarControl's width in the minimized state (when the NavigationPane paint style is applied).
An integer value that specifies the NavBarControl's width in the minimized state.
When the NavigationPane paint style is applied, the NavBarControl can be minimized to save space and then restored if necessary. The CalcCollapsedPaneWidth method calculates and returns the control's width that the control is resized to when it's minimized. See the OptionsNavPane.NavPaneState topic to learn more.