Steps to reproduce:
1. Switch main Panel layout into 'Task Manager'.
2. Change Task Manager settings:
    1) check 'Show tooltips';
    2) select 'Grouping' - 'By Program Name';
    3) check 'Open groups in popups';
    4) uncheck 'Only group when the task manager is full';
3. Launch two instance of same program - for example Dolphin.
4. Hover over Dolphin task in Panel.
5. Try to switch between Dolphin windows by clicking on tooltip windows.


Actual result:
After clicking on particular window in tooltip - this window becomes selected.