Hi ,
You can use 'set_on_close_event' method of 'IF_BSP_WD_POPUP' where you are opening the POPUP in code. Here you can pass the event name as in below code 'POPUP_CLOSE' .
data gr_ggl_popup TYPE REF TO if_bsp_wd_popup.
gr_ggl_popup->set_on_close_event( iv_view = me iv_event_name = 'POPUP_CLOSE' ).
Now in Event 'POPUP_CLOSE' you can write the code to navigate to Opportunity screen.
For this use below code.
DATA: lv_nav TYPE REF TO if_crm_ui_navigation_service.
lv_nav = cl_crm_ui_navigation_service=>get_instance( ).
check lv_nav is BOUND.
lv_nav->navigate( iv_link_id = 'ZLogicalLink').
Here 'ZLogicalLink' should be the logical link for Quotation overview in your BRole.
Hope it helps
Thanks
Kumar Gaurav.