Unfortunately, the previous commit for keeping the main window active does not...

Unfortunately, the previous commit for keeping the main window active does not function as desires on Linux.  It appears (on Linux) that the active window is always the top most window.  The functionality remains for Mac so that the Identification window is over the main window after an ID but the main window retains mouse focus.  A difference between the main window on Linux is that if the main window is not active, clicking any control (slice spin box), makes the window active.  On Mac it is different as the user must click the titlebar to make the window active (clicking a control such as slice spin box does not activate the window).