--move all the logic around parabolic effect signals
into one place, ParabolicManager. The ParabolicManager
is responsible for triggering all the messages to tasks
that are neighbour to the hovered task. This will
help a lot to catch cases such as separators and proper
clearing zoom.
--when a task needs attention the task bounces for
8500ms instead of 6500ms
--the color animation of needs attention was
improved in order to not drain the cpu cycles
--all animations concerning needs attention,bouncing
and color are stopped after the 8500ms timer
--the bounce animation is not stopped in the middle
but it waits each bounce to finish in order to make the checks