We have recently integrated Pega Knowledge Buddy widget to our Interaction Portal in the Case Context to help our CCR (Customer Care Representative) for any knowledge article search. For this we have added the Knowledge Buddy widget to our Implementation Layer section on the right pane as toggle icon. On click of toggle icon the right pane gets expanded and show Knowledge Buddy widget. By default this widget would be in collapsed state. But our Business requirement is when this right pane is in expanded mode then the left pane should automatically be collapsed state, giving reasonable area at the middle pane without distorting the screen elements. 

But it is not happening. The left pane still remains in expanded state.