first support for activities live ordering
second dragging attempt with draggingsreceivers
Activities ordering is here...

--I changed a bit the behavior because the previous one was very
resource hungry and had many bugs...
create a timer to trigger update ordering

--this way update ordering from the data engine occurs
only one time and not for every change for each Order field.
Perfomance has improved vastly because of this...
improved plasmoid according to kwin behavior

--now when an allDesktops and sameDesktops window
is moved does not loose its configuration
fixed a bug of changing to tasks workarea when it was dragged