--support properly applet separators. This is the
first part, in the future the margins for them
should be updated correctly and the edge cases,
for example when the applet separator is next to
tasks plasmoid
--the parabolicManager is informed about the applet
ids for hidden applets and separators. This way the
manager can process the signals for parabolic effect
much better and correctly
--all messages concerning parabolic effect are calculated
and send through the ParabolicManager. This will help
a lot in maintainance and in many cases in the future
such as, separators, hidden applets and clearing zoom
properly