Reset navigation item selected
In the Application I have a portal called Service Desk. In this portal there is placed menu (navigation rule in background). Selecting of element on that menu shows list of cases (in background there is opened harness, each element of menu opens different harness). When the element is selected in the menu the icon of this element changes color (background color is changed to black) to show this item was selected. In this portal there exist option to switch between applications, this switch causes that default harness is displayed and goal is to reflect this also in menu. After long investigations I cannot find a place where this information about selected item in menu is stored. What I need to do is set another item in menu as selected, but in the background without user interaction.
So to summarize I would like to know how storing of information which item is selected in the navigation looks like (if it's stored somewhere in the clipboard, which page it is) and how this can be changed without user action (by setting some data in background e.g by data transform or activity)?