tmf: Bug 499251: Call Stack view double-click listener no longer works

tmf: Bug 499251: Call Stack view double-click listener no longer works

The Call Stack view's time graph double-click listener is fixed to
handle the updated structured selection's content.

The class TimeGraphSelection is deprecated.

The spacing ratio added around the call stack event's range is removed.

Change-Id: I81d40aea54cd74b469cbcf3e119fde2db3b3b38f
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/78566
Reviewed-by: Hudson CI
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>