..ui.uyil: adding remove button to imageStackWidget

Change-Id: Ief627b44b8fecc78e6fa39cef0f8cb7192b7bbf1
Signed-off-by: Kunal Shroff <shroffk@bnl.gov>
..ui.util: adding some resizing based on scroll bar (alpha)

Change-Id: Iaf99ed582c31c65eb71a3c816e1e116c7340bcdf
Signed-off-by: Kunal Shroff <shroffk@bnl.gov>