The listview of the tree widget is not behaving like the Windows one (for example Windows Explorer). There are 2 reasons for that : 1- It is currently impossible to select anything but the first column of the listview (double-click action over an occurrence) 2- It is currently impossible to have the whole line active when selecting an occurrence. Only the first column is selectable.
Add a parameter in the listview so it is possible to select an occurrence of the list from any column (not only the first one). This parameter should also enable the use of double-click on any column and activate the whole line if selected.
Standard feature in Windows